{"id":2794,"date":"2016-09-27T15:10:19","date_gmt":"2016-09-27T08:10:19","guid":{"rendered":"http:\/\/www.giasuquocte.edu.vn\/sciences-elements-and-metals\/"},"modified":"2016-09-27T15:10:19","modified_gmt":"2016-09-27T08:10:19","slug":"sciences-elements-and-metals","status":"publish","type":"post","link":"https:\/\/giasuquocte.edu.vn\/en\/sciences-elements-and-metals\/","title":{"rendered":"Sciences &#8211; Elements and Metals"},"content":{"rendered":"<div id=\"watu_quiz\" class=\"quiz-area single-page-quiz\">\n<form action=\"\" method=\"post\" class=\"quiz-form \" id=\"quiz-10\" >\n<div class='watu-question' id='question-1'><div class='question-content'><p><span class='watu_num'>1. <\/span>Washing soda is the common name for<\/p>\n<\/div><input type='hidden' name='question_id[]' value='156' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='784' \/><div class='watu-question-choice'><input type='radio' name='answer-156[]' id='answer-id-784' class='answer answer-1  answerof-156' value='784' \/>&nbsp;<label for='answer-id-784' id='answer-label-784' class=' answer label-1'><span class='answer'>Sodium bicarbonate<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='785' \/><div class='watu-question-choice'><input type='radio' name='answer-156[]' id='answer-id-785' class='answer answer-1  answerof-156' value='785' \/>&nbsp;<label for='answer-id-785' id='answer-label-785' class=' answer label-1'><span class='answer'>Calcium carbonate<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='783' \/><div class='watu-question-choice'><input type='radio' name='answer-156[]' id='answer-id-783' class='answer answer-1  answerof-156' value='783' \/>&nbsp;<label for='answer-id-783' id='answer-label-783' class=' answer label-1'><span class='answer'>Calcium bicarbonate<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='782' \/><div class='watu-question-choice'><input type='radio' name='answer-156[]' id='answer-id-782' class='answer answer-1  answerof-156' value='782' \/>&nbsp;<label for='answer-id-782' id='answer-label-782' class=' answer label-1'><span class='answer'>Sodium carbonate<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType1' value='radio' class=''><\/div><div class='watu-question' id='question-2'><div class='question-content'><p><span class='watu_num'>2. <\/span>Which of the gas is not known as green house gas?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='158' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='796' \/><div class='watu-question-choice'><input type='radio' name='answer-158[]' id='answer-id-796' class='answer answer-2  answerof-158' value='796' \/>&nbsp;<label for='answer-id-796' id='answer-label-796' class=' answer label-2'><span class='answer'>Carbon dioxide<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='794' \/><div class='watu-question-choice'><input type='radio' name='answer-158[]' id='answer-id-794' class='answer answer-2  answerof-158' value='794' \/>&nbsp;<label for='answer-id-794' id='answer-label-794' class=' answer label-2'><span class='answer'>Methane<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='797' \/><div class='watu-question-choice'><input type='radio' name='answer-158[]' id='answer-id-797' class='answer answer-2  answerof-158' value='797' \/>&nbsp;<label for='answer-id-797' id='answer-label-797' class=' answer label-2'><span class='answer'>Hydrogen<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='795' \/><div class='watu-question-choice'><input type='radio' name='answer-158[]' id='answer-id-795' class='answer answer-2  answerof-158' value='795' \/>&nbsp;<label for='answer-id-795' id='answer-label-795' class=' answer label-2'><span class='answer'>Nitrous oxide<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType2' value='radio' class=''><\/div><div class='watu-question' id='question-3'><div class='question-content'><p><span class='watu_num'>3. <\/span>In which of the following activities silicon carbide is used?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='167' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='836' \/><div class='watu-question-choice'><input type='radio' name='answer-167[]' id='answer-id-836' class='answer answer-3  answerof-167' value='836' \/>&nbsp;<label for='answer-id-836' id='answer-label-836' class=' answer label-3'><span class='answer'>cutting very hard substances<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='837' \/><div class='watu-question-choice'><input type='radio' name='answer-167[]' id='answer-id-837' class='answer answer-3  answerof-167' value='837' \/>&nbsp;<label for='answer-id-837' id='answer-label-837' class=' answer label-3'><span class='answer'>Making casts for statues<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='835' \/><div class='watu-question-choice'><input type='radio' name='answer-167[]' id='answer-id-835' class='answer answer-3  answerof-167' value='835' \/>&nbsp;<label for='answer-id-835' id='answer-label-835' class=' answer label-3'><span class='answer'>Disinfecting water of ponds<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='834' \/><div class='watu-question-choice'><input type='radio' name='answer-167[]' id='answer-id-834' class='answer answer-3  answerof-167' value='834' \/>&nbsp;<label for='answer-id-834' id='answer-label-834' class=' answer label-3'><span class='answer'>Making cement and glass<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType3' value='radio' class=''><\/div><div class='watu-question' id='question-4'><div class='question-content'><p><span class='watu_num'>4. <\/span>The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is<\/p>\n<\/div><input type='hidden' name='question_id[]' value='164' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='823' \/><div class='watu-question-choice'><input type='radio' name='answer-164[]' id='answer-id-823' class='answer answer-4  answerof-164' value='823' \/>&nbsp;<label for='answer-id-823' id='answer-label-823' class=' answer label-4'><span class='answer'>Xenon<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='824' \/><div class='watu-question-choice'><input type='radio' name='answer-164[]' id='answer-id-824' class='answer answer-4  answerof-164' value='824' \/>&nbsp;<label for='answer-id-824' id='answer-label-824' class=' answer label-4'><span class='answer'>Helium<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='825' \/><div class='watu-question-choice'><input type='radio' name='answer-164[]' id='answer-id-825' class='answer answer-4  answerof-164' value='825' \/>&nbsp;<label for='answer-id-825' id='answer-label-825' class=' answer label-4'><span class='answer'>Krypton<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='822' \/><div class='watu-question-choice'><input type='radio' name='answer-164[]' id='answer-id-822' class='answer answer-4  answerof-164' value='822' \/>&nbsp;<label for='answer-id-822' id='answer-label-822' class=' answer label-4'><span class='answer'>Argon<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType4' value='radio' class=''><\/div><div class='watu-question' id='question-5'><div class='question-content'><p><span class='watu_num'>5. <\/span>The variety of coal in which the deposit contains recognisable traces of the original plant material is<\/p>\n<\/div><input type='hidden' name='question_id[]' value='161' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='811' \/><div class='watu-question-choice'><input type='radio' name='answer-161[]' id='answer-id-811' class='answer answer-5  answerof-161' value='811' \/>&nbsp;<label for='answer-id-811' id='answer-label-811' class=' answer label-5'><span class='answer'>anthracite<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='812' \/><div class='watu-question-choice'><input type='radio' name='answer-161[]' id='answer-id-812' class='answer answer-5  answerof-161' value='812' \/>&nbsp;<label for='answer-id-812' id='answer-label-812' class=' answer label-5'><span class='answer'>lignite<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='813' \/><div class='watu-question-choice'><input type='radio' name='answer-161[]' id='answer-id-813' class='answer answer-5  answerof-161' value='813' \/>&nbsp;<label for='answer-id-813' id='answer-label-813' class=' answer label-5'><span class='answer'>peat<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='810' \/><div class='watu-question-choice'><input type='radio' name='answer-161[]' id='answer-id-810' class='answer answer-5  answerof-161' value='810' \/>&nbsp;<label for='answer-id-810' id='answer-label-810' class=' answer label-5'><span class='answer'>bitumen<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType5' value='radio' class=''><\/div><div class='watu-question' id='question-6'><div class='question-content'><p><span class='watu_num'>6. <\/span>Quartz crystals normally used in quartz clocks etc. is chemically<\/p>\n<\/div><input type='hidden' name='question_id[]' value='157' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='786' \/><div class='watu-question-choice'><input type='radio' name='answer-157[]' id='answer-id-786' class='answer answer-6  answerof-157' value='786' \/>&nbsp;<label for='answer-id-786' id='answer-label-786' class=' answer label-6'><span class='answer'>silicon dioxide<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='788' \/><div class='watu-question-choice'><input type='radio' name='answer-157[]' id='answer-id-788' class='answer answer-6  answerof-157' value='788' \/>&nbsp;<label for='answer-id-788' id='answer-label-788' class=' answer label-6'><span class='answer'>a mixture of germanium oxide and silicon dioxide<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='789' \/><div class='watu-question-choice'><input type='radio' name='answer-157[]' id='answer-id-789' class='answer answer-6  answerof-157' value='789' \/>&nbsp;<label for='answer-id-789' id='answer-label-789' class=' answer label-6'><span class='answer'>sodium silicate<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='787' \/><div class='watu-question-choice'><input type='radio' name='answer-157[]' id='answer-id-787' class='answer answer-6  answerof-157' value='787' \/>&nbsp;<label for='answer-id-787' id='answer-label-787' class=' answer label-6'><span class='answer'>germanium oxide<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType6' value='radio' class=''><\/div><div class='watu-question' id='question-7'><div class='question-content'><p><span class='watu_num'>7. <\/span>The hardest substance available on earth is<\/p>\n<\/div><input type='hidden' name='question_id[]' value='160' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='802' \/><div class='watu-question-choice'><input type='radio' name='answer-160[]' id='answer-id-802' class='answer answer-7  answerof-160' value='802' \/>&nbsp;<label for='answer-id-802' id='answer-label-802' class=' answer label-7'><span class='answer'>Gold<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='803' \/><div class='watu-question-choice'><input type='radio' name='answer-160[]' id='answer-id-803' class='answer answer-7  answerof-160' value='803' \/>&nbsp;<label for='answer-id-803' id='answer-label-803' class=' answer label-7'><span class='answer'>Iron<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='805' \/><div class='watu-question-choice'><input type='radio' name='answer-160[]' id='answer-id-805' class='answer answer-7  answerof-160' value='805' \/>&nbsp;<label for='answer-id-805' id='answer-label-805' class=' answer label-7'><span class='answer'>Platinum<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='804' \/><div class='watu-question-choice'><input type='radio' name='answer-160[]' id='answer-id-804' class='answer answer-7  answerof-160' value='804' \/>&nbsp;<label for='answer-id-804' id='answer-label-804' class=' answer label-7'><span class='answer'>Diamond<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType7' value='radio' class=''><\/div><div class='watu-question' id='question-8'><div class='question-content'><p><span class='watu_num'>8. <\/span>The average salinity of sea water is<\/p>\n<\/div><input type='hidden' name='question_id[]' value='168' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='840' \/><div class='watu-question-choice'><input type='radio' name='answer-168[]' id='answer-id-840' class='answer answer-8  answerof-168' value='840' \/>&nbsp;<label for='answer-id-840' id='answer-label-840' class=' answer label-8'><span class='answer'>2.5%<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='839' \/><div class='watu-question-choice'><input type='radio' name='answer-168[]' id='answer-id-839' class='answer answer-8  answerof-168' value='839' \/>&nbsp;<label for='answer-id-839' id='answer-label-839' class=' answer label-8'><span class='answer'>3.5%<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='841' \/><div class='watu-question-choice'><input type='radio' name='answer-168[]' id='answer-id-841' class='answer answer-8  answerof-168' value='841' \/>&nbsp;<label for='answer-id-841' id='answer-label-841' class=' answer label-8'><span class='answer'>2%<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='838' \/><div class='watu-question-choice'><input type='radio' name='answer-168[]' id='answer-id-838' class='answer answer-8  answerof-168' value='838' \/>&nbsp;<label for='answer-id-838' id='answer-label-838' class=' answer label-8'><span class='answer'>3%<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType8' value='radio' class=''><\/div><div class='watu-question' id='question-9'><div class='question-content'><p><span class='watu_num'>9. <\/span>The gases used in different types of welding would include<\/p>\n<\/div><input type='hidden' name='question_id[]' value='165' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='827' \/><div class='watu-question-choice'><input type='radio' name='answer-165[]' id='answer-id-827' class='answer answer-9  answerof-165' value='827' \/>&nbsp;<label for='answer-id-827' id='answer-label-827' class=' answer label-9'><span class='answer'>oxygen, hydrogen, acetylene and nitrogen<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='826' \/><div class='watu-question-choice'><input type='radio' name='answer-165[]' id='answer-id-826' class='answer answer-9  answerof-165' value='826' \/>&nbsp;<label for='answer-id-826' id='answer-label-826' class=' answer label-9'><span class='answer'>oxygen and hydrogen<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='828' \/><div class='watu-question-choice'><input type='radio' name='answer-165[]' id='answer-id-828' class='answer answer-9  answerof-165' value='828' \/>&nbsp;<label for='answer-id-828' id='answer-label-828' class=' answer label-9'><span class='answer'>oxygen, acetylene and argon<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='829' \/><div class='watu-question-choice'><input type='radio' name='answer-165[]' id='answer-id-829' class='answer answer-9  answerof-165' value='829' \/>&nbsp;<label for='answer-id-829' id='answer-label-829' class=' answer label-9'><span class='answer'>oxygen and acetylene<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType9' value='radio' class=''><\/div><div class='watu-question' id='question-10'><div class='question-content'><p><span class='watu_num'>10. <\/span>Brass gets discoloured in air because of the presence of which of the following gases in air?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='149' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='746' \/><div class='watu-question-choice'><input type='radio' name='answer-149[]' id='answer-id-746' class='answer answer-10  answerof-149' value='746' \/>&nbsp;<label for='answer-id-746' id='answer-label-746' class=' answer label-10'><span class='answer'>Oxygen<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='747' \/><div class='watu-question-choice'><input type='radio' name='answer-149[]' id='answer-id-747' class='answer answer-10  answerof-149' value='747' \/>&nbsp;<label for='answer-id-747' id='answer-label-747' class=' answer label-10'><span class='answer'>Hydrogen sulphide<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='748' \/><div class='watu-question-choice'><input type='radio' name='answer-149[]' id='answer-id-748' class='answer answer-10  answerof-149' value='748' \/>&nbsp;<label for='answer-id-748' id='answer-label-748' class=' answer label-10'><span class='answer'>Carbon dioxide<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='749' \/><div class='watu-question-choice'><input type='radio' name='answer-149[]' id='answer-id-749' class='answer answer-10  answerof-149' value='749' \/>&nbsp;<label for='answer-id-749' id='answer-label-749' class=' answer label-10'><span class='answer'>Nitrogen<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType10' value='radio' class=''><\/div><div class='watu-question' id='question-11'><div class='question-content'><p><span class='watu_num'>11. <\/span>Bromine is a<\/p>\n<\/div><input type='hidden' name='question_id[]' value='159' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='800' \/><div class='watu-question-choice'><input type='radio' name='answer-159[]' id='answer-id-800' class='answer answer-11  answerof-159' value='800' \/>&nbsp;<label for='answer-id-800' id='answer-label-800' class=' answer label-11'><span class='answer'>colourless gas<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='798' \/><div class='watu-question-choice'><input type='radio' name='answer-159[]' id='answer-id-798' class='answer answer-11  answerof-159' value='798' \/>&nbsp;<label for='answer-id-798' id='answer-label-798' class=' answer label-11'><span class='answer'>black solid<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='801' \/><div class='watu-question-choice'><input type='radio' name='answer-159[]' id='answer-id-801' class='answer answer-11  answerof-159' value='801' \/>&nbsp;<label for='answer-id-801' id='answer-label-801' class=' answer label-11'><span class='answer'>highly inflammable gas<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='799' \/><div class='watu-question-choice'><input type='radio' name='answer-159[]' id='answer-id-799' class='answer answer-11  answerof-159' value='799' \/>&nbsp;<label for='answer-id-799' id='answer-label-799' class=' answer label-11'><span class='answer'>red liquid<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType11' value='radio' class=''><\/div><div class='watu-question' id='question-12'><div class='question-content'><p><span class='watu_num'>12. <\/span>Chlorophyll is a naturally occurring chelate compound in which central metal is<\/p>\n<\/div><input type='hidden' name='question_id[]' value='151' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='754' \/><div class='watu-question-choice'><input type='radio' name='answer-151[]' id='answer-id-754' class='answer answer-12  answerof-151' value='754' \/>&nbsp;<label for='answer-id-754' id='answer-label-754' class=' answer label-12'><span class='answer'>copper<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='756' \/><div class='watu-question-choice'><input type='radio' name='answer-151[]' id='answer-id-756' class='answer answer-12  answerof-151' value='756' \/>&nbsp;<label for='answer-id-756' id='answer-label-756' class=' answer label-12'><span class='answer'>iron<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='757' \/><div class='watu-question-choice'><input type='radio' name='answer-151[]' id='answer-id-757' class='answer answer-12  answerof-151' value='757' \/>&nbsp;<label for='answer-id-757' id='answer-label-757' class=' answer label-12'><span class='answer'>calcium<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='755' \/><div class='watu-question-choice'><input type='radio' name='answer-151[]' id='answer-id-755' class='answer answer-12  answerof-151' value='755' \/>&nbsp;<label for='answer-id-755' id='answer-label-755' class=' answer label-12'><span class='answer'>magnesium<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType12' value='radio' class=''><\/div><div class='watu-question' id='question-13'><div class='question-content'><p><span class='watu_num'>13. <\/span>Chemical formula for water is<\/p>\n<\/div><input type='hidden' name='question_id[]' value='154' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='773' \/><div class='watu-question-choice'><input type='radio' name='answer-154[]' id='answer-id-773' class='answer answer-13  answerof-154' value='773' \/>&nbsp;<label for='answer-id-773' id='answer-label-773' class=' answer label-13'><span class='answer'>CaSiO3<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='771' \/><div class='watu-question-choice'><input type='radio' name='answer-154[]' id='answer-id-771' class='answer answer-13  answerof-154' value='771' \/>&nbsp;<label for='answer-id-771' id='answer-label-771' class=' answer label-13'><span class='answer'>H2O<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='770' \/><div class='watu-question-choice'><input type='radio' name='answer-154[]' id='answer-id-770' class='answer answer-13  answerof-154' value='770' \/>&nbsp;<label for='answer-id-770' id='answer-label-770' class=' answer label-13'><span class='answer'>NaAlO2<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='772' \/><div class='watu-question-choice'><input type='radio' name='answer-154[]' id='answer-id-772' class='answer answer-13  answerof-154' value='772' \/>&nbsp;<label for='answer-id-772' id='answer-label-772' class=' answer label-13'><span class='answer'>Al2O3<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType13' value='radio' class=''><\/div><div class='watu-question' id='question-14'><div class='question-content'><p><span class='watu_num'>14. <\/span>Which of the following metals forms an amalgam with other metals?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='153' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='767' \/><div class='watu-question-choice'><input type='radio' name='answer-153[]' id='answer-id-767' class='answer answer-14  answerof-153' value='767' \/>&nbsp;<label for='answer-id-767' id='answer-label-767' class=' answer label-14'><span class='answer'>Mercury<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='766' \/><div class='watu-question-choice'><input type='radio' name='answer-153[]' id='answer-id-766' class='answer answer-14  answerof-153' value='766' \/>&nbsp;<label for='answer-id-766' id='answer-label-766' class=' answer label-14'><span class='answer'>Tin<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='768' \/><div class='watu-question-choice'><input type='radio' name='answer-153[]' id='answer-id-768' class='answer answer-14  answerof-153' value='768' \/>&nbsp;<label for='answer-id-768' id='answer-label-768' class=' answer label-14'><span class='answer'>Lead<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='769' \/><div class='watu-question-choice'><input type='radio' name='answer-153[]' id='answer-id-769' class='answer answer-14  answerof-153' value='769' \/>&nbsp;<label for='answer-id-769' id='answer-label-769' class=' answer label-14'><span class='answer'>Zinc<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType14' value='radio' class=''><\/div><div class='watu-question' id='question-15'><div class='question-content'><p><span class='watu_num'>15. <\/span>The property of a substance to absorb moisture from the air on exposure is called<\/p>\n<\/div><input type='hidden' name='question_id[]' value='166' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='831' \/><div class='watu-question-choice'><input type='radio' name='answer-166[]' id='answer-id-831' class='answer answer-15  answerof-166' value='831' \/>&nbsp;<label for='answer-id-831' id='answer-label-831' class=' answer label-15'><span class='answer'>Deliquescence<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='832' \/><div class='watu-question-choice'><input type='radio' name='answer-166[]' id='answer-id-832' class='answer answer-15  answerof-166' value='832' \/>&nbsp;<label for='answer-id-832' id='answer-label-832' class=' answer label-15'><span class='answer'>Efflorescence<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='830' \/><div class='watu-question-choice'><input type='radio' name='answer-166[]' id='answer-id-830' class='answer answer-15  answerof-166' value='830' \/>&nbsp;<label for='answer-id-830' id='answer-label-830' class=' answer label-15'><span class='answer'>Osmosis<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='833' \/><div class='watu-question-choice'><input type='radio' name='answer-166[]' id='answer-id-833' class='answer answer-15  answerof-166' value='833' \/>&nbsp;<label for='answer-id-833' id='answer-label-833' class=' answer label-15'><span class='answer'>Desiccation<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType15' value='radio' class=''><\/div><div class='watu-question' id='question-16'><div class='question-content'><p><span class='watu_num'>16. <\/span>Which of the following is used as a lubricant?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='163' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='818' \/><div class='watu-question-choice'><input type='radio' name='answer-163[]' id='answer-id-818' class='answer answer-16  answerof-163' value='818' \/>&nbsp;<label for='answer-id-818' id='answer-label-818' class=' answer label-16'><span class='answer'>Graphite<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='820' \/><div class='watu-question-choice'><input type='radio' name='answer-163[]' id='answer-id-820' class='answer answer-16  answerof-163' value='820' \/>&nbsp;<label for='answer-id-820' id='answer-label-820' class=' answer label-16'><span class='answer'>Iron Oxide<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='821' \/><div class='watu-question-choice'><input type='radio' name='answer-163[]' id='answer-id-821' class='answer answer-16  answerof-163' value='821' \/>&nbsp;<label for='answer-id-821' id='answer-label-821' class=' answer label-16'><span class='answer'>Diamond<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='819' \/><div class='watu-question-choice'><input type='radio' name='answer-163[]' id='answer-id-819' class='answer answer-16  answerof-163' value='819' \/>&nbsp;<label for='answer-id-819' id='answer-label-819' class=' answer label-16'><span class='answer'>Silica<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType16' value='radio' class=''><\/div><div class='watu-question' id='question-17'><div class='question-content'><p><span class='watu_num'>17. <\/span>Tetraethyl lead is used as<\/p>\n<\/div><input type='hidden' name='question_id[]' value='162' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='817' \/><div class='watu-question-choice'><input type='radio' name='answer-162[]' id='answer-id-817' class='answer answer-17  answerof-162' value='817' \/>&nbsp;<label for='answer-id-817' id='answer-label-817' class=' answer label-17'><span class='answer'>petrol additive<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='814' \/><div class='watu-question-choice'><input type='radio' name='answer-162[]' id='answer-id-814' class='answer answer-17  answerof-162' value='814' \/>&nbsp;<label for='answer-id-814' id='answer-label-814' class=' answer label-17'><span class='answer'>pain killer<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='815' \/><div class='watu-question-choice'><input type='radio' name='answer-162[]' id='answer-id-815' class='answer answer-17  answerof-162' value='815' \/>&nbsp;<label for='answer-id-815' id='answer-label-815' class=' answer label-17'><span class='answer'>fire extinguisher<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='816' \/><div class='watu-question-choice'><input type='radio' name='answer-162[]' id='answer-id-816' class='answer answer-17  answerof-162' value='816' \/>&nbsp;<label for='answer-id-816' id='answer-label-816' class=' answer label-17'><span class='answer'>mosquito repellent<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType17' value='radio' class=''><\/div><div class='watu-question' id='question-18'><div class='question-content'><p><span class='watu_num'>18. <\/span>Which of the following is used in pencils?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='152' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='765' \/><div class='watu-question-choice'><input type='radio' name='answer-152[]' id='answer-id-765' class='answer answer-18  answerof-152' value='765' \/>&nbsp;<label for='answer-id-765' id='answer-label-765' class=' answer label-18'><span class='answer'>Phosphorous<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='762' \/><div class='watu-question-choice'><input type='radio' name='answer-152[]' id='answer-id-762' class='answer answer-18  answerof-152' value='762' \/>&nbsp;<label for='answer-id-762' id='answer-label-762' class=' answer label-18'><span class='answer'>Graphite<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='764' \/><div class='watu-question-choice'><input type='radio' name='answer-152[]' id='answer-id-764' class='answer answer-18  answerof-152' value='764' \/>&nbsp;<label for='answer-id-764' id='answer-label-764' class=' answer label-18'><span class='answer'>Charcoal<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='763' \/><div class='watu-question-choice'><input type='radio' name='answer-152[]' id='answer-id-763' class='answer answer-18  answerof-152' value='763' \/>&nbsp;<label for='answer-id-763' id='answer-label-763' class=' answer label-18'><span class='answer'>Silicon<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType18' value='radio' class=''><\/div><div class='watu-question' id='question-19'><div class='question-content'><p><span class='watu_num'>19. <\/span>The gas usually filled in the electric bulb is<\/p>\n<\/div><input type='hidden' name='question_id[]' value='155' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='777' \/><div class='watu-question-choice'><input type='radio' name='answer-155[]' id='answer-id-777' class='answer answer-19  answerof-155' value='777' \/>&nbsp;<label for='answer-id-777' id='answer-label-777' class=' answer label-19'><span class='answer'>oxygen<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='775' \/><div class='watu-question-choice'><input type='radio' name='answer-155[]' id='answer-id-775' class='answer answer-19  answerof-155' value='775' \/>&nbsp;<label for='answer-id-775' id='answer-label-775' class=' answer label-19'><span class='answer'>hydrogen<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='776' \/><div class='watu-question-choice'><input type='radio' name='answer-155[]' id='answer-id-776' class='answer answer-19  answerof-155' value='776' \/>&nbsp;<label for='answer-id-776' id='answer-label-776' class=' answer label-19'><span class='answer'>carbon dioxide<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='774' \/><div class='watu-question-choice'><input type='radio' name='answer-155[]' id='answer-id-774' class='answer answer-19  answerof-155' value='774' \/>&nbsp;<label for='answer-id-774' id='answer-label-774' class=' answer label-19'><span class='answer'>nitrogen<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType19' value='radio' class=''><\/div><div class='watu-question' id='question-20'><div class='question-content'><p><span class='watu_num'>20. <\/span>Which of the following is a non metal that remains liquid at room temperature?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='150' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='753' \/><div class='watu-question-choice'><input type='radio' name='answer-150[]' id='answer-id-753' class='answer answer-20  answerof-150' value='753' \/>&nbsp;<label for='answer-id-753' id='answer-label-753' class=' answer label-20'><span class='answer'>Helium<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='750' \/><div class='watu-question-choice'><input type='radio' name='answer-150[]' id='answer-id-750' class='answer answer-20  answerof-150' value='750' \/>&nbsp;<label for='answer-id-750' id='answer-label-750' class=' answer label-20'><span class='answer'>Phosphorous<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='751' \/><div class='watu-question-choice'><input type='radio' name='answer-150[]' id='answer-id-751' class='answer answer-20  answerof-150' value='751' \/>&nbsp;<label for='answer-id-751' id='answer-label-751' class=' answer label-20'><span class='answer'>Bromine<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='752' \/><div class='watu-question-choice'><input type='radio' name='answer-150[]' id='answer-id-752' class='answer answer-20  answerof-150' value='752' \/>&nbsp;<label for='answer-id-752' id='answer-label-752' class=' answer label-20'><span class='answer'>Chlorine<\/span><\/label><\/div>\n<\/div><input type='hidden' id='questionType20' value='radio' class=''><\/div><div style='display:none' id='question-21'><br \/><div class='question-content'><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/giasuquocte.edu.vn\/wp-content\/plugins\/watu\/loading.gif\" width=\"16\" height=\"16\" alt=\"Loading ...\" title=\"Loading ...\" \/>&nbsp;Loading &#8230;<\/div><\/div><br \/>\n<input type=\"button\" name=\"action\" onclick=\"Watu.submitResult()\" id=\"action-button\" value=\"Submit\"  class=\"watu-submit-button\" \/>\n<input type=\"hidden\" name=\"no_ajax\" value=\"0\"><input type=\"hidden\" name=\"quiz_id\" value=\"10\" \/>\n<input type=\"hidden\" id=\"watuStartTime\" name=\"start_time\" value=\"2026-04-19 12:31:19\" \/>\n<\/form>\n<\/div>\n<div id=\"watu-loading-result\" style=\"display:none;\">\n\t<p align=\"center\"><img loading=\"lazy\" decoding=\"async\" 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