{"id":699,"date":"2024-04-11T01:45:54","date_gmt":"2024-04-10T22:45:54","guid":{"rendered":"https:\/\/sisu.ut.ee\/heritage-analysis\/self-test-5-1\/"},"modified":"2024-07-17T19:18:00","modified_gmt":"2024-07-17T16:18:00","slug":"self-test-5-1","status":"publish","type":"page","link":"https:\/\/sisu.ut.ee\/heritage-analysis\/self-test-5-1\/","title":{"rendered":"SELF TEST 5.1"},"content":{"rendered":"<div id=\"watupro_quiz\" class=\"quiz-area single-page-quiz\">\n<p id=\"submittingExam10\" style=\"display:none;text-align:center;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/sisu.ut.ee\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\"><\/p>\n\n<div class=\"watupro-exam-description\" id=\"description-quiz-10\"><h2><span style=\"color: #000000;\">Questions about general theoretical aspects of <\/span><strong><span style=\"color: #b22222;\">chromatography<\/span><\/strong><span style=\"color: #000000;\">.\u00a0<\/span><\/h2>\n<p>\u00a0<\/p>\n<\/div>\n\n<form action=\"\" method=\"post\" class=\"quiz-form\" id=\"quiz-10\" enctype=\"multipart\/form-data\">\n<div class=\"watu-question \" id=\"question-1\" style=\";\"><div id=\"questionWrap-1\" class=\"  watupro-required-66 watupro-question-id-66\">\n\t\t\t<div class=\"question-content\"><div><p>What type of information from a chromatogram is used for qualitative analysis?<span style=\"font-size:12px;\"> (There can be one or more correct answers)<\/span><\/p><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_1\" value=\"66\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType66\" class=\"answerTypeCnt1\" value=\"checkbox\"><input type=\"hidden\" id=\"watupro-required-question-66\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices66\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-66[]\" id=\"answer-id-311\" class=\"answer   answerof-66 \" value=\"311\"><label for=\"answer-id-311\" id=\"answer-label-311\" class=\" answer\"><span><p>Based on retention time - retention time of a compound is constant under the same conditions, irrespective of the material type<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-66[]\" id=\"answer-id-312\" class=\"answer   answerof-66 \" value=\"312\"><label for=\"answer-id-312\" id=\"answer-label-312\" class=\" answer\"><span><p>The area of the peak is used for identification<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-66[]\" id=\"answer-id-313\" class=\"answer   answerof-66 \" value=\"313\"><label for=\"answer-id-313\" id=\"answer-label-313\" class=\" answer\"><span><p>The height of the peak is used for identification<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-66[]\" id=\"answer-id-314\" class=\"answer   answerof-66 \" value=\"314\"><label for=\"answer-id-314\" id=\"answer-label-314\" class=\" answer\"><span><p>Based on retention time - retention time of the same compound is different in different materials and mixtures, but is always the same in one type of material or mixture<\/p><\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-2\" style=\";\"><div id=\"questionWrap-2\" class=\"  watupro-required-67 watupro-question-id-67\">\n\t\t\t<div class=\"question-content\"><div><p>Which types of compounds exit the column first in reversed-phase liquid chromatography (i.e. the mobile phase is more polar than the stationary phase)?<em> <\/em><span style=\"font-size:12px;\">(There can be one or more correct answers)<\/span><\/p><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_2\" value=\"67\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType67\" class=\"answerTypeCnt2\" value=\"checkbox\"><input type=\"hidden\" id=\"watupro-required-question-67\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices67\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-67[]\" id=\"answer-id-315\" class=\"answer   answerof-67 \" value=\"315\"><label for=\"answer-id-315\" id=\"answer-label-315\" class=\" answer\"><span><p>Polar<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-67[]\" id=\"answer-id-316\" class=\"answer   answerof-67 \" value=\"316\"><label for=\"answer-id-316\" id=\"answer-label-316\" class=\" answer\"><span><p>Non-polar<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-67[]\" id=\"answer-id-317\" class=\"answer   answerof-67 \" value=\"317\"><label for=\"answer-id-317\" id=\"answer-label-317\" class=\" answer\"><span><p>This cannot be decided based on the polarity<\/p><\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-3\" style=\";\"><div id=\"questionWrap-3\" class=\"  watupro-required-68 watupro-question-id-68\">\n\t\t\t<div class=\"question-content\"><div><p>Separation in the GC system is mostly based on\u2026 <span style=\"font-size:12px;\">(End the following sentence with the correct option)\u00a0<\/span><\/p><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_3\" value=\"68\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType68\" class=\"answerTypeCnt3\" value=\"checkbox\"><input type=\"hidden\" id=\"watupro-required-question-68\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices68\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-68[]\" id=\"answer-id-318\" class=\"answer   answerof-68 \" value=\"318\"><label for=\"answer-id-318\" id=\"answer-label-318\" class=\" answer\"><span><p>... differences in boiling points of the compounds<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-68[]\" id=\"answer-id-319\" class=\"answer   answerof-68 \" value=\"319\"><label for=\"answer-id-319\" id=\"answer-label-319\" class=\" answer\"><span><p>\u2026 differences in polarity<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-68[]\" id=\"answer-id-320\" class=\"answer   answerof-68 \" value=\"320\"><label for=\"answer-id-320\" id=\"answer-label-320\" class=\" answer\"><span><p>\u2026 differences in ionic charge<\/p><\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-4\" style=\";\"><div id=\"questionWrap-4\" class=\"  watupro-required-69 watupro-question-id-69\">\n\t\t\t<div class=\"question-content\"><div><p>Which of the following are detectors used for LC systems? <span style=\"font-size:12px;\">(There can be one or more correct answers)<\/span><em>\u00a0<\/em><\/p><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_4\" value=\"69\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType69\" class=\"answerTypeCnt4\" value=\"checkbox\"><input type=\"hidden\" id=\"watupro-required-question-69\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices69\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-69[]\" id=\"answer-id-321\" class=\"answer   answerof-69 \" value=\"321\"><label for=\"answer-id-321\" id=\"answer-label-321\" class=\" answer\"><span><p>Mass spectrometer (MS) detector<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-69[]\" id=\"answer-id-322\" class=\"answer   answerof-69 \" value=\"322\"><label for=\"answer-id-322\" id=\"answer-label-322\" class=\" answer\"><span><p>UV-Vis\/ photodiode array (PDA) detector<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-69[]\" id=\"answer-id-323\" class=\"answer   answerof-69 \" value=\"323\"><label for=\"answer-id-323\" id=\"answer-label-323\" class=\" answer\"><span><p>Flame ionisation detector (FID)<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-69[]\" id=\"answer-id-324\" class=\"answer   answerof-69 \" value=\"324\"><label for=\"answer-id-324\" id=\"answer-label-324\" class=\" answer\"><span><p>Fluorescence detector (FLD)<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-69[]\" id=\"answer-id-325\" class=\"answer   answerof-69 \" value=\"325\"><label for=\"answer-id-325\" id=\"answer-label-325\" class=\" answer\"><span><p>Energy-dispersive X-ray detector (EDS)<\/p><\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-5\" style=\";\"><div id=\"questionWrap-5\" class=\"  watupro-required-70 watupro-question-id-70\">\n\t\t\t<div class=\"question-content\"><div><p>Which of the following are key aspects for achieving separation in LC? <span style=\"font-size:12px;\">(There can be one or more correct answers)<\/span><\/p><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_5\" value=\"70\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType70\" class=\"answerTypeCnt5\" value=\"checkbox\"><input type=\"hidden\" id=\"watupro-required-question-70\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices70\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-70[]\" id=\"answer-id-326\" class=\"answer   answerof-70 \" value=\"326\"><label for=\"answer-id-326\" id=\"answer-label-326\" class=\" answer\"><span><p>The composition of the mobile phase<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-70[]\" id=\"answer-id-327\" class=\"answer   answerof-70 \" value=\"327\"><label for=\"answer-id-327\" id=\"answer-label-327\" class=\" answer\"><span><p>Composition of stationary phase<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-70[]\" id=\"answer-id-328\" class=\"answer   answerof-70 \" value=\"328\"><label for=\"answer-id-328\" id=\"answer-label-328\" class=\" answer\"><span><p>Stationary phase temperature above 300 \u00b0C<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-70[]\" id=\"answer-id-329\" class=\"answer   answerof-70 \" value=\"329\"><label for=\"answer-id-329\" id=\"answer-label-329\" class=\" answer\"><span><p>Only derivatised compounds can be separated<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-70[]\" id=\"answer-id-330\" class=\"answer   answerof-70 \" value=\"330\"><label for=\"answer-id-330\" id=\"answer-label-330\" class=\" answer\"><span><p>Good separation is achieved with mobile phase with pH 7<\/p><\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-6\" style=\";\"><div id=\"questionWrap-6\" class=\"  watupro-required-71 watupro-question-id-71\">\n\t\t\t<div class=\"question-content\"><div><p>Why are buffer solutions used in LC?<span style=\"font-size:12px;\"> (There can be one or more correct answers)\u00a0<\/span><\/p><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_6\" value=\"71\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType71\" class=\"answerTypeCnt6\" value=\"checkbox\"><input type=\"hidden\" id=\"watupro-required-question-71\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices71\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-71[]\" id=\"answer-id-331\" class=\"answer   answerof-71 \" value=\"331\"><label for=\"answer-id-331\" id=\"answer-label-331\" class=\" answer\"><span><p>So the analysed components would not change the conditions (pH) of the mobile phase\u00a0<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-71[]\" id=\"answer-id-332\" class=\"answer   answerof-71 \" value=\"332\"><label for=\"answer-id-332\" id=\"answer-label-332\" class=\" answer\"><span><p>So the sample (solution) would not get contaminated<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-71[]\" id=\"answer-id-333\" class=\"answer   answerof-71 \" value=\"333\"><label for=\"answer-id-333\" id=\"answer-label-333\" class=\" answer\"><span><p>The instrument would get contaminated without buffer<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-71[]\" id=\"answer-id-334\" class=\"answer   answerof-71 \" value=\"334\"><label for=\"answer-id-334\" id=\"answer-label-334\" class=\" answer\"><span><p>So the analysed compounds would be in suitable charge state<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-71[]\" id=\"answer-id-335\" class=\"answer   answerof-71 \" value=\"335\"><label for=\"answer-id-335\" id=\"answer-label-335\" class=\" answer\"><span><p>So that the analysed compounds will be volatile<\/p><\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-7\" style=\";\"><div id=\"questionWrap-7\" class=\"  watupro-required-72 watupro-question-id-72\">\n\t\t\t<div class=\"question-content\"><div><p>Which statements are true about a compound that can be analysed with GC (without sample pre-treatment)? <span style=\"font-size:12px;\">(There can be one or more correct answers)<\/span><\/p><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_7\" value=\"72\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType72\" class=\"answerTypeCnt7\" value=\"checkbox\"><input type=\"hidden\" id=\"watupro-required-question-72\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices72\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-72[]\" id=\"answer-id-336\" class=\"answer   answerof-72 \" value=\"336\"><label for=\"answer-id-336\" id=\"answer-label-336\" class=\" answer\"><span><p>It must be thermally stable<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-72[]\" id=\"answer-id-337\" class=\"answer   answerof-72 \" value=\"337\"><label for=\"answer-id-337\" id=\"answer-label-337\" class=\" answer\"><span><p>\u00a0It must be volatile<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-72[]\" id=\"answer-id-338\" class=\"answer   answerof-72 \" value=\"338\"><label for=\"answer-id-338\" id=\"answer-label-338\" class=\" answer\"><span><p>It must be an organic compound<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-72[]\" id=\"answer-id-339\" class=\"answer   answerof-72 \" value=\"339\"><label for=\"answer-id-339\" id=\"answer-label-339\" class=\" answer\"><span><p>The boiling point of the compound cannot be below 500\u00b0C<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-72[]\" id=\"answer-id-340\" class=\"answer   answerof-72 \" value=\"340\"><label for=\"answer-id-340\" id=\"answer-label-340\" class=\" answer\"><span><p>It can be analysed by dissolving it in water<\/p><\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-8\" style=\";\"><div id=\"questionWrap-8\" class=\"  watupro-required-73 watupro-question-id-73\">\n\t\t\t<div class=\"question-content\"><div><p>Chromatography is a \u2026 <span style=\"font-size:12px;\">(There can be one or more correct answers)<\/span><\/p><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_8\" value=\"73\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType73\" class=\"answerTypeCnt8\" value=\"checkbox\"><input type=\"hidden\" id=\"watupro-required-question-73\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices73\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-73[]\" id=\"answer-id-341\" class=\"answer   answerof-73 \" value=\"341\"><label for=\"answer-id-341\" id=\"answer-label-341\" class=\" answer\"><span><p>\u00a0\u2026 technique for separating compounds from a mixture<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-73[]\" id=\"answer-id-342\" class=\"answer   answerof-73 \" value=\"342\"><label for=\"answer-id-342\" id=\"answer-label-342\" class=\" answer\"><span><p>\u2026 technique that uses mobile and stationary phase for separating compounds<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-73[]\" id=\"answer-id-343\" class=\"answer   answerof-73 \" value=\"343\"><label for=\"answer-id-343\" id=\"answer-label-343\" class=\" answer\"><span><p>\u2026 technique for comparing materials with each-other<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-73[]\" id=\"answer-id-344\" class=\"answer   answerof-73 \" value=\"344\"><label for=\"answer-id-344\" id=\"answer-label-344\" class=\" answer\"><span><p>\u2026 technique for separating compound according to mass-to-charge ratio<\/p><\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-9\" style=\";\"><div id=\"questionWrap-9\" class=\"  watupro-required-74 watupro-question-id-74\">\n\t\t\t<div class=\"question-content\"><div><p>Retention time is... <span style=\"font-size:12px;\">(There can be one or more correct answers)<\/span><\/p><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_9\" value=\"74\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType74\" class=\"answerTypeCnt9\" value=\"checkbox\"><input type=\"hidden\" id=\"watupro-required-question-74\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices74\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-74[]\" id=\"answer-id-345\" class=\"answer   answerof-74 \" value=\"345\"><label for=\"answer-id-345\" id=\"answer-label-345\" class=\" answer\"><span><p>...the time it takes for a compound to pass through the chromatographic column under the set conditions<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-74[]\" id=\"answer-id-346\" class=\"answer   answerof-74 \" value=\"346\"><label for=\"answer-id-346\" id=\"answer-label-346\" class=\" answer\"><span><p>...the time it takes to dissolve a compound in the chromatographic column<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-74[]\" id=\"answer-id-347\" class=\"answer   answerof-74 \" value=\"347\"><label for=\"answer-id-347\" id=\"answer-label-347\" class=\" answer\"><span><p>...the time of sample preparation<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-74[]\" id=\"answer-id-348\" class=\"answer   answerof-74 \" value=\"348\"><label for=\"answer-id-348\" id=\"answer-label-348\" class=\" answer\"><span><p>...the time to generate ions in the chromatographic column<\/p><\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-10\" style=\";\"><div id=\"questionWrap-10\" class=\"  watupro-required-75 watupro-question-id-75\">\n\t\t\t<div class=\"question-content\"><div><p>What type of information from a chromatogram is used for quantitative analysis? <span style=\"font-size:12px;\">(There can be one or more correct answers)<\/span><\/p><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_10\" value=\"75\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType75\" class=\"answerTypeCnt10\" value=\"checkbox\"><input type=\"hidden\" id=\"watupro-required-question-75\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices75\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-75[]\" id=\"answer-id-349\" class=\"answer   answerof-75 \" value=\"349\"><label for=\"answer-id-349\" id=\"answer-label-349\" class=\" answer\"><span><p>Peak area<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-75[]\" id=\"answer-id-350\" class=\"answer   answerof-75 \" value=\"350\"><label for=\"answer-id-350\" id=\"answer-label-350\" class=\" answer\"><span><p>Peak height<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-75[]\" id=\"answer-id-351\" class=\"answer   answerof-75 \" value=\"351\"><label for=\"answer-id-351\" id=\"answer-label-351\" class=\" answer\"><span><p>Retention time of the peak<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-75[]\" id=\"answer-id-352\" class=\"answer   answerof-75 \" value=\"352\"><label for=\"answer-id-352\" id=\"answer-label-352\" class=\" answer\"><span><p>Boiling point of the compound<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-75[]\" id=\"answer-id-353\" class=\"answer   answerof-75 \" value=\"353\"><label for=\"answer-id-353\" id=\"answer-label-353\" class=\" answer\"><span><p>Peak area \u2013 the highest peak in the chromatogram must be used for quantification<\/p><\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-11\" style=\";\"><div id=\"questionWrap-11\" class=\"  watupro-required-76 watupro-question-id-76\">\n\t\t\t<div class=\"question-content\"><div><p>Which of the following are detectors used for GC systems? <span style=\"font-size:12px;\">(There can be one or more correct answers)<\/span><\/p><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_11\" value=\"76\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType76\" class=\"answerTypeCnt11\" value=\"checkbox\"><input type=\"hidden\" id=\"watupro-required-question-76\"><!-- end question-content--><\/div><div class=\"question-choices watupro-choices-columns \" id=\"questionChoices76\"><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-76[]\" id=\"answer-id-354\" class=\"answer   answerof-76 \" value=\"354\"><label for=\"answer-id-354\" id=\"answer-label-354\" class=\" answer\"><span><p>Mass spectrometer (MS) detector<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-76[]\" id=\"answer-id-355\" class=\"answer   answerof-76 \" value=\"355\"><label for=\"answer-id-355\" id=\"answer-label-355\" class=\" answer\"><span><p>UV-Vis\/ photodiode array (PDA) detector<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-76[]\" id=\"answer-id-356\" class=\"answer   answerof-76 \" value=\"356\"><label for=\"answer-id-356\" id=\"answer-label-356\" class=\" answer\"><span><p>Flame ionisation detector (FID)<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-76[]\" id=\"answer-id-357\" class=\"answer   answerof-76 \" value=\"357\"><label for=\"answer-id-357\" id=\"answer-label-357\" class=\" answer\"><span><p>Fluorescence detector (FLD)<\/p><\/span><\/label><\/div><div class=\"watupro-question-choice  \" dir=\"auto\"><input type=\"checkbox\" name=\"answer-76[]\" id=\"answer-id-358\" class=\"answer   answerof-76 \" value=\"358\"><label for=\"answer-id-358\" id=\"answer-label-358\" class=\" answer\"><span><p>Energy-dispersive X-ray detector (EDS)<\/p><\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-12\" style=\";\"><div id=\"questionWrap-12\" class=\"  watupro-required-77 watupro-question-id-77\">\n\t\t\t<div class=\"question-content\"><p>Which GC or LC detector is described?<\/p><div class=\"question-choices\"><table class=\"question-choices watupro-matrix-droppable\" id=\"watuPROMatrixDroppable_77\"><tr><td class=\"watupro-matrix-left-cell\">This detector can be used for the analysis of compounds that contain at least one C-H or C-C bond. In the detector, the compounds are burned and ionised in a hydrogen flame.<\/td>\n\t\t\t\t\t\t<td class=\"watupro-matrix-right-cell watuPRODroppable77\" id=\"watuPRODroppableCell359\"><div class=\"question-choices\"><div class=\"watupro-matrix-right\"><div id=\"watuproNMatrixSelection-0-0\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-0\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell359', 0);return false;\">FLD<!--WTPMD55ff7ec3a7733e8d8bf34d18b6cc7a383--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-0-1\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-1\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell359', 1);return false;\">UV-Vis\/PDA<!--WTPMD5143b292d48736b9864b98c16c6482f91--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-0-2\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-2\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell359', 2);return false;\">FID<!--WTPMD5593d93bff109de1dfaa56da4eb9e380f--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-0-3\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-3\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell359', 3);return false;\">MS<!--WTPMD57a663caea1b722a63dc2868158ed584d--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><\/div><\/div><input type=\"hidden\" class=\"answerof-77 watupro-nmatrix-answer-field\" id=\"field-watuPRODroppableCell359\" name=\"matrix-left-359\" value=\"\"><\/td><\/tr><tr><td class=\"watupro-matrix-left-cell\">In this detector, the separated compounds are ionised and the formed ions are sorted by their mass-to-charge (m\/z) ratio.<\/td>\n\t\t\t\t\t\t<td class=\"watupro-matrix-right-cell watuPRODroppable77\" id=\"watuPRODroppableCell360\"><div class=\"question-choices\"><div class=\"watupro-matrix-right\"><div id=\"watuproNMatrixSelection-1-0\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-0\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell360', 0);return false;\">FLD<!--WTPMD55ff7ec3a7733e8d8bf34d18b6cc7a383--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-1-1\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-1\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell360', 1);return false;\">UV-Vis\/PDA<!--WTPMD5143b292d48736b9864b98c16c6482f91--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-1-2\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-2\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell360', 2);return false;\">FID<!--WTPMD5593d93bff109de1dfaa56da4eb9e380f--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-1-3\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-3\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell360', 3);return false;\">MS<!--WTPMD57a663caea1b722a63dc2868158ed584d--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><\/div><\/div><input type=\"hidden\" class=\"answerof-77 watupro-nmatrix-answer-field\" id=\"field-watuPRODroppableCell360\" name=\"matrix-left-360\" value=\"\"><\/td><\/tr><tr><td class=\"watupro-matrix-left-cell\">This detector enables the qualitative and quantitative analysis of different compounds by recording the UV-Vis absorption spectrum (in the range of 190-780 nm) for each chromatographic peak.<\/td>\n\t\t\t\t\t\t<td class=\"watupro-matrix-right-cell watuPRODroppable77\" id=\"watuPRODroppableCell361\"><div class=\"question-choices\"><div class=\"watupro-matrix-right\"><div id=\"watuproNMatrixSelection-2-0\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-0\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell361', 0);return false;\">FLD<!--WTPMD55ff7ec3a7733e8d8bf34d18b6cc7a383--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-2-1\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-1\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell361', 1);return false;\">UV-Vis\/PDA<!--WTPMD5143b292d48736b9864b98c16c6482f91--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-2-2\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-2\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell361', 2);return false;\">FID<!--WTPMD5593d93bff109de1dfaa56da4eb9e380f--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-2-3\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-3\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell361', 3);return false;\">MS<!--WTPMD57a663caea1b722a63dc2868158ed584d--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><\/div><\/div><input type=\"hidden\" class=\"answerof-77 watupro-nmatrix-answer-field\" id=\"field-watuPRODroppableCell361\" name=\"matrix-left-361\" value=\"\"><\/td><\/tr><tr><td class=\"watupro-matrix-left-cell\">This detector is suitable for the analysis of compounds with fluorescent properties.<\/td>\n\t\t\t\t\t\t<td class=\"watupro-matrix-right-cell watuPRODroppable77\" id=\"watuPRODroppableCell362\"><div class=\"question-choices\"><div class=\"watupro-matrix-right\"><div id=\"watuproNMatrixSelection-3-0\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-0\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell362', 0);return false;\">FLD<!--WTPMD55ff7ec3a7733e8d8bf34d18b6cc7a383--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-3-1\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-1\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell362', 1);return false;\">UV-Vis\/PDA<!--WTPMD5143b292d48736b9864b98c16c6482f91--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-3-2\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-2\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell362', 2);return false;\">FID<!--WTPMD5593d93bff109de1dfaa56da4eb9e380f--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-3-3\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-3\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell362', 3);return false;\">MS<!--WTPMD57a663caea1b722a63dc2868158ed584d--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><\/div><\/div><input type=\"hidden\" class=\"answerof-77 watupro-nmatrix-answer-field\" id=\"field-watuPRODroppableCell362\" name=\"matrix-left-362\" value=\"\"><\/td><\/tr><\/table><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_12\" value=\"77\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType77\" class=\"answerTypeCnt12\" value=\"nmatrix\"><input type=\"hidden\" id=\"watupro-required-question-77\"><!-- end question-content--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-13\" style=\";\"><div id=\"questionWrap-13\" class=\"  watupro-required-78 watupro-question-id-78\">\n\t\t\t<div class=\"question-content\"><p>Are the following statement true or false?\u00a0<\/p>\n<p><select name=\"gap_78_1\" class=\"watupro-gap answer answerof-78\"><option value=\"\"><\/option><option value=\"False\">False<\/option><option value=\"True\">True<\/option><\/select>\u00a0 \u00a0 In LC|the mobile phase is liquid and the stationary phase is solid.<\/p>\n<p><select name=\"gap_78_2\" class=\"watupro-gap answer answerof-78\"><option value=\"\"><\/option><option value=\"False\">False<\/option><option value=\"True\">True<\/option><\/select>\u00a0 \u00a0 In LC|the mobile phase is liquid and the stationary phase is liquid.<\/p>\n<p><select name=\"gap_78_3\" class=\"watupro-gap answer answerof-78\"><option value=\"\"><\/option><option value=\"False\">False<\/option><option value=\"True\">True<\/option><\/select>\u00a0 \u00a0 In GC|the mobile phase is gaseous and the stationary phase is liquid.<\/p>\n<p><select name=\"gap_78_4\" class=\"watupro-gap answer answerof-78\"><option value=\"\"><\/option><option value=\"True\">True<\/option><option value=\"False\">False<\/option><\/select>\u00a0 \u00a0 In GC|the mobile phase is liquid and the stationary phase is liquid.\u00a0\u00a0<\/p>\n<p><select name=\"gap_78_5\" class=\"watupro-gap answer answerof-78\"><option value=\"\"><\/option><option value=\"False\">False<\/option><option value=\"True\">True<\/option><\/select>\u00a0 \u00a0 In LC|the mobile phase is gaseous and the stationary phase is solid.\u00a0<\/p>\n<input type=\"hidden\" name=\"question_id[]\" id=\"qID_13\" value=\"78\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType78\" class=\"answerTypeCnt13\" value=\"gaps\"><input type=\"hidden\" id=\"watupro-required-question-78\"><!-- end question-content--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-14\" style=\";\"><div id=\"questionWrap-14\" class=\"  watupro-required-79 watupro-question-id-79\">\n\t\t\t<div class=\"question-content\"><p>Match the following material to the corresponding technique:\u00a0<\/p><div class=\"question-choices\"><table class=\"question-choices watupro-matrix-droppable\" id=\"watuPROMatrixDroppable_79\"><tr><td class=\"watupro-matrix-left-cell\">Analysis of polymers by decomposing them into smaller fragments.<\/td>\n\t\t\t\t\t\t<td class=\"watupro-matrix-right-cell watuPRODroppable79\" id=\"watuPRODroppableCell364\"><div class=\"question-choices\"><div class=\"watupro-matrix-right\"><div id=\"watuproNMatrixSelection-0-0\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-0\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell364', 0);return false;\">Py-GC-MS<!--WTPMD59b1dee593b21acd18fa391a819a28ba4--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-0-1\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-1\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell364', 1);return false;\">GC-MS<!--WTPMD5196b5cae74a56bfeed69c7866023451c--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-0-2\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-2\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell364', 2);return false;\">SPME GC-MS<!--WTPMD5c429196d829db8d17cef6234ad3b56ce--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><\/div><\/div><input type=\"hidden\" class=\"answerof-79 watupro-nmatrix-answer-field\" id=\"field-watuPRODroppableCell364\" name=\"matrix-left-364\" value=\"\"><\/td><\/tr><tr><td class=\"watupro-matrix-left-cell\">Analysis of volatile and semi-volatile compounds thanks to a special fibre that adsorbs them.<\/td>\n\t\t\t\t\t\t<td class=\"watupro-matrix-right-cell watuPRODroppable79\" id=\"watuPRODroppableCell365\"><div class=\"question-choices\"><div class=\"watupro-matrix-right\"><div id=\"watuproNMatrixSelection-1-0\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-0\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell365', 0);return false;\">Py-GC-MS<!--WTPMD59b1dee593b21acd18fa391a819a28ba4--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-1-1\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-1\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell365', 1);return false;\">GC-MS<!--WTPMD5196b5cae74a56bfeed69c7866023451c--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-1-2\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-2\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell365', 2);return false;\">SPME GC-MS<!--WTPMD5c429196d829db8d17cef6234ad3b56ce--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><\/div><\/div><input type=\"hidden\" class=\"answerof-79 watupro-nmatrix-answer-field\" id=\"field-watuPRODroppableCell365\" name=\"matrix-left-365\" value=\"\"><\/td><\/tr><tr><td class=\"watupro-matrix-left-cell\">Analysis of volatile, thermally stable compounds with boiling points  below 500\u00b0C. <\/td>\n\t\t\t\t\t\t<td class=\"watupro-matrix-right-cell watuPRODroppable79\" id=\"watuPRODroppableCell366\"><div class=\"question-choices\"><div class=\"watupro-matrix-right\"><div id=\"watuproNMatrixSelection-2-0\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-0\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell366', 0);return false;\">Py-GC-MS<!--WTPMD59b1dee593b21acd18fa391a819a28ba4--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-2-1\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-1\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell366', 1);return false;\">GC-MS<!--WTPMD5196b5cae74a56bfeed69c7866023451c--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-2-2\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-2\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell366', 2);return false;\">SPME GC-MS<!--WTPMD5c429196d829db8d17cef6234ad3b56ce--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><\/div><\/div><input type=\"hidden\" class=\"answerof-79 watupro-nmatrix-answer-field\" id=\"field-watuPRODroppableCell366\" name=\"matrix-left-366\" value=\"\"><\/td><\/tr><\/table><\/div><input type=\"hidden\" name=\"question_id[]\" id=\"qID_14\" value=\"79\" class=\"watupro-question-id\"><input type=\"hidden\" id=\"answerType79\" class=\"answerTypeCnt14\" value=\"nmatrix\"><input type=\"hidden\" id=\"watupro-required-question-79\"><!-- end question-content--><\/div><!-- end questionWrap--><\/div><\/div><div class=\"watu-question \" id=\"question-15\" style=\";\"><div id=\"questionWrap-15\" class=\"  watupro-required-80 watupro-question-id-80\">\n\t\t\t<div class=\"question-content\"><p>Match the description with the corresponding type of LC technique:\u00a0<\/p><div class=\"question-choices\"><table class=\"question-choices watupro-matrix-droppable\" id=\"watuPROMatrixDroppable_80\"><tr><td class=\"watupro-matrix-left-cell\">Compounds are separated according to their polarity in a system where the mobile phase is more polar than the stationary phase.<\/td>\n\t\t\t\t\t\t<td class=\"watupro-matrix-right-cell watuPRODroppable80\" id=\"watuPRODroppableCell367\"><div class=\"question-choices\"><div class=\"watupro-matrix-right\"><div id=\"watuproNMatrixSelection-0-0\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-0\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell367', 0);return false;\">Ion chromatography<!--WTPMD554cddc9742e737ad736a375435dc5064--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-0-1\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-1\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell367', 1);return false;\">Reverse-phase LC<!--WTPMD5fe9b27bcd2ed0bea7d918d9ff8647c4c--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-0-2\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-2\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell367', 2);return false;\">Normal-phase LC<!--WTPMD578dee7c38e8f668fa4c6cead25811c9d--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-0-3\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-3\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell367', 3);return false;\">Size exclusion chromatography<!--WTPMD5a4f70d567d0f255567b62991ea1465c0--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><\/div><\/div><input type=\"hidden\" class=\"answerof-80 watupro-nmatrix-answer-field\" id=\"field-watuPRODroppableCell367\" name=\"matrix-left-367\" value=\"\"><\/td><\/tr><tr><td class=\"watupro-matrix-left-cell\">Compounds are separated according to their polarity in a system where the mobile phase is less polar than the stationary phase.<\/td>\n\t\t\t\t\t\t<td class=\"watupro-matrix-right-cell watuPRODroppable80\" id=\"watuPRODroppableCell368\"><div class=\"question-choices\"><div class=\"watupro-matrix-right\"><div id=\"watuproNMatrixSelection-1-0\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-0\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell368', 0);return false;\">Ion chromatography<!--WTPMD554cddc9742e737ad736a375435dc5064--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-1-1\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-1\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell368', 1);return false;\">Reverse-phase LC<!--WTPMD5fe9b27bcd2ed0bea7d918d9ff8647c4c--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-1-2\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-2\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell368', 2);return false;\">Normal-phase LC<!--WTPMD578dee7c38e8f668fa4c6cead25811c9d--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-1-3\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-3\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell368', 3);return false;\">Size exclusion chromatography<!--WTPMD5a4f70d567d0f255567b62991ea1465c0--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><\/div><\/div><input type=\"hidden\" class=\"answerof-80 watupro-nmatrix-answer-field\" id=\"field-watuPRODroppableCell368\" name=\"matrix-left-368\" value=\"\"><\/td><\/tr><tr><td class=\"watupro-matrix-left-cell\">Compounds are separated according to the size of the molecules.<\/td>\n\t\t\t\t\t\t<td class=\"watupro-matrix-right-cell watuPRODroppable80\" id=\"watuPRODroppableCell369\"><div class=\"question-choices\"><div class=\"watupro-matrix-right\"><div id=\"watuproNMatrixSelection-2-0\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-0\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell369', 0);return false;\">Ion chromatography<!--WTPMD554cddc9742e737ad736a375435dc5064--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-2-1\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-1\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell369', 1);return false;\">Reverse-phase LC<!--WTPMD5fe9b27bcd2ed0bea7d918d9ff8647c4c--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-2-2\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-2\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell369', 2);return false;\">Normal-phase LC<!--WTPMD578dee7c38e8f668fa4c6cead25811c9d--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-2-3\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-3\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell369', 3);return false;\">Size exclusion chromatography<!--WTPMD5a4f70d567d0f255567b62991ea1465c0--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><\/div><\/div><input type=\"hidden\" class=\"answerof-80 watupro-nmatrix-answer-field\" id=\"field-watuPRODroppableCell369\" name=\"matrix-left-369\" value=\"\"><\/td><\/tr><tr><td class=\"watupro-matrix-left-cell\">Compounds are separated during an ion exchange process that happens between the sample and the stationary phase.<\/td>\n\t\t\t\t\t\t<td class=\"watupro-matrix-right-cell watuPRODroppable80\" id=\"watuPRODroppableCell370\"><div class=\"question-choices\"><div class=\"watupro-matrix-right\"><div id=\"watuproNMatrixSelection-3-0\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-0\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell370', 0);return false;\">Ion chromatography<!--WTPMD554cddc9742e737ad736a375435dc5064--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-3-1\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-1\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell370', 1);return false;\">Reverse-phase LC<!--WTPMD5fe9b27bcd2ed0bea7d918d9ff8647c4c--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-3-2\" class=\" watupro-matrix-draggable watupro-nmatrix-answer-2\" onclick=\"WatuPROINMatrix.sel(this, 'watuPRODroppableCell370', 2);return false;\">Normal-phase LC<!--WTPMD578dee7c38e8f668fa4c6cead25811c9d--><p class=\"watupro-nmatrix-unselect\">Unselect<\/p><\/div><div id=\"watuproNMatrixSelection-3-3\" class=\" 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