{"id":3145,"date":"2016-10-20T14:17:36","date_gmt":"2016-10-20T07:17:36","guid":{"rendered":"http:\/\/www.giasuquocte.edu.vn\/sciences-elements-and-metals-2\/"},"modified":"2016-10-20T14:17:36","modified_gmt":"2016-10-20T07:17:36","slug":"sciences-elements-and-metals-2","status":"publish","type":"post","link":"https:\/\/giasuquocte.edu.vn\/en\/sciences-elements-and-metals-2\/","title":{"rendered":"Sciences \u2013 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-24\" >\n<div class='watu-question' id='question-1'><div class='question-content'><p><span class='watu_num'>1. <\/span>Which of the following are the ingredients of gun metal?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='447' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1977' \/><div class='watu-question-choice'><input type='radio' name='answer-447[]' id='answer-id-1977' class='answer answer-1  answerof-447' value='1977' \/>&nbsp;<label for='answer-id-1977' id='answer-label-1977' class=' answer label-1'><span class='answer'>Iron, Brass, Tin<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1978' \/><div class='watu-question-choice'><input type='radio' name='answer-447[]' id='answer-id-1978' class='answer answer-1  answerof-447' value='1978' \/>&nbsp;<label for='answer-id-1978' id='answer-label-1978' class=' answer label-1'><span class='answer'>Copper, Tin<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1976' \/><div class='watu-question-choice'><input type='radio' name='answer-447[]' id='answer-id-1976' class='answer answer-1  answerof-447' value='1976' \/>&nbsp;<label for='answer-id-1976' id='answer-label-1976' class=' answer label-1'><span class='answer'>Iron, Tin<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1975' \/><div class='watu-question-choice'><input type='radio' name='answer-447[]' id='answer-id-1975' class='answer answer-1  answerof-447' value='1975' \/>&nbsp;<label for='answer-id-1975' id='answer-label-1975' class=' answer label-1'><span class='answer'>Iron, Zinc, Titanium<\/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>Sodium metal is kept under<\/p>\n<\/div><input type='hidden' name='question_id[]' value='446' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1971' \/><div class='watu-question-choice'><input type='radio' name='answer-446[]' id='answer-id-1971' class='answer answer-2  answerof-446' value='1971' \/>&nbsp;<label for='answer-id-1971' id='answer-label-1971' class=' answer label-2'><span class='answer'>petrol<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1973' \/><div class='watu-question-choice'><input type='radio' name='answer-446[]' id='answer-id-1973' class='answer answer-2  answerof-446' value='1973' \/>&nbsp;<label for='answer-id-1973' id='answer-label-1973' class=' answer label-2'><span class='answer'>water<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1974' \/><div class='watu-question-choice'><input type='radio' name='answer-446[]' id='answer-id-1974' class='answer answer-2  answerof-446' value='1974' \/>&nbsp;<label for='answer-id-1974' id='answer-label-1974' class=' answer label-2'><span class='answer'>kerosene<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1972' \/><div class='watu-question-choice'><input type='radio' name='answer-446[]' id='answer-id-1972' class='answer answer-2  answerof-446' value='1972' \/>&nbsp;<label for='answer-id-1972' id='answer-label-1972' class=' answer label-2'><span class='answer'>alcohol<\/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>Soda water contains<\/p>\n<\/div><input type='hidden' name='question_id[]' value='434' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1920' \/><div class='watu-question-choice'><input type='radio' name='answer-434[]' id='answer-id-1920' class='answer answer-3  answerof-434' value='1920' \/>&nbsp;<label for='answer-id-1920' id='answer-label-1920' class=' answer label-3'><span class='answer'>sulphuric acid<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1921' \/><div class='watu-question-choice'><input type='radio' name='answer-434[]' id='answer-id-1921' class='answer answer-3  answerof-434' value='1921' \/>&nbsp;<label for='answer-id-1921' id='answer-label-1921' class=' answer label-3'><span class='answer'>carbon dioxide<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1922' \/><div class='watu-question-choice'><input type='radio' name='answer-434[]' id='answer-id-1922' class='answer answer-3  answerof-434' value='1922' \/>&nbsp;<label for='answer-id-1922' id='answer-label-1922' class=' answer label-3'><span class='answer'>nitrous acid<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1919' \/><div class='watu-question-choice'><input type='radio' name='answer-434[]' id='answer-id-1919' class='answer answer-3  answerof-434' value='1919' \/>&nbsp;<label for='answer-id-1919' id='answer-label-1919' class=' answer label-3'><span class='answer'>carbonic acid<\/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>From which mineral is radium obtained?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='448' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1979' \/><div class='watu-question-choice'><input type='radio' name='answer-448[]' id='answer-id-1979' class='answer answer-4  answerof-448' value='1979' \/>&nbsp;<label for='answer-id-1979' id='answer-label-1979' class=' answer label-4'><span class='answer'>Rutile<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1982' \/><div class='watu-question-choice'><input type='radio' name='answer-448[]' id='answer-id-1982' class='answer answer-4  answerof-448' value='1982' \/>&nbsp;<label for='answer-id-1982' id='answer-label-1982' class=' answer label-4'><span class='answer'>Pitchblende<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1981' \/><div class='watu-question-choice'><input type='radio' name='answer-448[]' id='answer-id-1981' class='answer answer-4  answerof-448' value='1981' \/>&nbsp;<label for='answer-id-1981' id='answer-label-1981' class=' answer label-4'><span class='answer'>Limestone<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1980' \/><div class='watu-question-choice'><input type='radio' name='answer-448[]' id='answer-id-1980' class='answer answer-4  answerof-448' value='1980' \/>&nbsp;<label for='answer-id-1980' id='answer-label-1980' class=' answer label-4'><span class='answer'>Hematite<\/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>Heavy water is<\/p>\n<\/div><input type='hidden' name='question_id[]' value='420' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1863' \/><div class='watu-question-choice'><input type='radio' name='answer-420[]' id='answer-id-1863' class='answer answer-5  answerof-420' value='1863' \/>&nbsp;<label for='answer-id-1863' id='answer-label-1863' class=' answer label-5'><span class='answer'>deuterium oxide<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1864' \/><div class='watu-question-choice'><input type='radio' name='answer-420[]' id='answer-id-1864' class='answer answer-5  answerof-420' value='1864' \/>&nbsp;<label for='answer-id-1864' id='answer-label-1864' class=' answer label-5'><span class='answer'>PH7<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1865' \/><div class='watu-question-choice'><input type='radio' name='answer-420[]' id='answer-id-1865' class='answer answer-5  answerof-420' value='1865' \/>&nbsp;<label for='answer-id-1865' id='answer-label-1865' class=' answer label-5'><span class='answer'>rain water<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1866' \/><div class='watu-question-choice'><input type='radio' name='answer-420[]' id='answer-id-1866' class='answer answer-5  answerof-420' value='1866' \/>&nbsp;<label for='answer-id-1866' id='answer-label-1866' class=' answer label-5'><span class='answer'>tritium oxide<\/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>Galvanised iron sheets have a coating of<\/p>\n<\/div><input type='hidden' name='question_id[]' value='414' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1840' \/><div class='watu-question-choice'><input type='radio' name='answer-414[]' id='answer-id-1840' class='answer answer-6  answerof-414' value='1840' \/>&nbsp;<label for='answer-id-1840' id='answer-label-1840' class=' answer label-6'><span class='answer'>zinc<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1839' \/><div class='watu-question-choice'><input type='radio' name='answer-414[]' id='answer-id-1839' class='answer answer-6  answerof-414' value='1839' \/>&nbsp;<label for='answer-id-1839' id='answer-label-1839' class=' answer label-6'><span class='answer'>chromium<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1838' \/><div class='watu-question-choice'><input type='radio' name='answer-414[]' id='answer-id-1838' class='answer answer-6  answerof-414' value='1838' \/>&nbsp;<label for='answer-id-1838' id='answer-label-1838' class=' answer label-6'><span class='answer'>lead<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1841' \/><div class='watu-question-choice'><input type='radio' name='answer-414[]' id='answer-id-1841' class='answer answer-6  answerof-414' value='1841' \/>&nbsp;<label for='answer-id-1841' id='answer-label-1841' class=' answer label-6'><span class='answer'>tin<\/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>Most soluble in water is<\/p>\n<\/div><input type='hidden' name='question_id[]' value='439' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1944' \/><div class='watu-question-choice'><input type='radio' name='answer-439[]' id='answer-id-1944' class='answer answer-7  answerof-439' value='1944' \/>&nbsp;<label for='answer-id-1944' id='answer-label-1944' class=' answer label-7'><span class='answer'>sulphur<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1946' \/><div class='watu-question-choice'><input type='radio' name='answer-439[]' id='answer-id-1946' class='answer answer-7  answerof-439' value='1946' \/>&nbsp;<label for='answer-id-1946' id='answer-label-1946' class=' answer label-7'><span class='answer'>sugar<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1943' \/><div class='watu-question-choice'><input type='radio' name='answer-439[]' id='answer-id-1943' class='answer answer-7  answerof-439' value='1943' \/>&nbsp;<label for='answer-id-1943' id='answer-label-1943' class=' answer label-7'><span class='answer'>camphor<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1945' \/><div class='watu-question-choice'><input type='radio' name='answer-439[]' id='answer-id-1945' class='answer answer-7  answerof-439' value='1945' \/>&nbsp;<label for='answer-id-1945' id='answer-label-1945' class=' answer label-7'><span class='answer'>common salt<\/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>Non stick cooking utensils are coated with<\/p>\n<\/div><input type='hidden' name='question_id[]' value='426' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1887' \/><div class='watu-question-choice'><input type='radio' name='answer-426[]' id='answer-id-1887' class='answer answer-8  answerof-426' value='1887' \/>&nbsp;<label for='answer-id-1887' id='answer-label-1887' class=' answer label-8'><span class='answer'>teflon<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1888' \/><div class='watu-question-choice'><input type='radio' name='answer-426[]' id='answer-id-1888' class='answer answer-8  answerof-426' value='1888' \/>&nbsp;<label for='answer-id-1888' id='answer-label-1888' class=' answer label-8'><span class='answer'>PVC<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1890' \/><div class='watu-question-choice'><input type='radio' name='answer-426[]' id='answer-id-1890' class='answer answer-8  answerof-426' value='1890' \/>&nbsp;<label for='answer-id-1890' id='answer-label-1890' class=' answer label-8'><span class='answer'>polystyrene<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1889' \/><div class='watu-question-choice'><input type='radio' name='answer-426[]' id='answer-id-1889' class='answer answer-8  answerof-426' value='1889' \/>&nbsp;<label for='answer-id-1889' id='answer-label-1889' class=' answer label-8'><span class='answer'>black paint<\/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 element common to all acids is<\/p>\n<\/div><input type='hidden' name='question_id[]' value='424' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1880' \/><div class='watu-question-choice'><input type='radio' name='answer-424[]' id='answer-id-1880' class='answer answer-9  answerof-424' value='1880' \/>&nbsp;<label for='answer-id-1880' id='answer-label-1880' class=' answer label-9'><span class='answer'>carbon<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1881' \/><div class='watu-question-choice'><input type='radio' name='answer-424[]' id='answer-id-1881' class='answer answer-9  answerof-424' value='1881' \/>&nbsp;<label for='answer-id-1881' id='answer-label-1881' class=' answer label-9'><span class='answer'>sulphur<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1879' \/><div class='watu-question-choice'><input type='radio' name='answer-424[]' id='answer-id-1879' class='answer answer-9  answerof-424' value='1879' \/>&nbsp;<label for='answer-id-1879' id='answer-label-1879' class=' answer label-9'><span class='answer'>hydrogen<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1882' \/><div class='watu-question-choice'><input type='radio' name='answer-424[]' id='answer-id-1882' class='answer answer-9  answerof-424' value='1882' \/>&nbsp;<label for='answer-id-1882' id='answer-label-1882' class=' answer label-9'><span class='answer'>oxygen<\/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>Which of the following was to be discovered first in the chromospheres of the sun?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='441' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1951' \/><div class='watu-question-choice'><input type='radio' name='answer-441[]' id='answer-id-1951' class='answer answer-10  answerof-441' value='1951' \/>&nbsp;<label for='answer-id-1951' id='answer-label-1951' class=' answer label-10'><span class='answer'>Krypton<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1953' \/><div class='watu-question-choice'><input type='radio' name='answer-441[]' id='answer-id-1953' class='answer answer-10  answerof-441' value='1953' \/>&nbsp;<label for='answer-id-1953' id='answer-label-1953' class=' answer label-10'><span class='answer'>Neon<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1954' \/><div class='watu-question-choice'><input type='radio' name='answer-441[]' id='answer-id-1954' class='answer answer-10  answerof-441' value='1954' \/>&nbsp;<label for='answer-id-1954' id='answer-label-1954' class=' answer label-10'><span class='answer'>Helium<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1952' \/><div class='watu-question-choice'><input type='radio' name='answer-441[]' id='answer-id-1952' class='answer answer-10  answerof-441' value='1952' \/>&nbsp;<label for='answer-id-1952' id='answer-label-1952' class=' answer label-10'><span class='answer'>Xenon<\/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>Permanent hardness of water may be removed by the addition of<\/p>\n<\/div><input type='hidden' name='question_id[]' value='431' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1910' \/><div class='watu-question-choice'><input type='radio' name='answer-431[]' id='answer-id-1910' class='answer answer-11  answerof-431' value='1910' \/>&nbsp;<label for='answer-id-1910' id='answer-label-1910' class=' answer label-11'><span class='answer'>lime<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1909' \/><div class='watu-question-choice'><input type='radio' name='answer-431[]' id='answer-id-1909' class='answer answer-11  answerof-431' value='1909' \/>&nbsp;<label for='answer-id-1909' id='answer-label-1909' class=' answer label-11'><span class='answer'>potassium permanganate<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1908' \/><div class='watu-question-choice'><input type='radio' name='answer-431[]' id='answer-id-1908' class='answer answer-11  answerof-431' value='1908' \/>&nbsp;<label for='answer-id-1908' id='answer-label-1908' class=' answer label-11'><span class='answer'>alum<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1907' \/><div class='watu-question-choice'><input type='radio' name='answer-431[]' id='answer-id-1907' class='answer answer-11  answerof-431' value='1907' \/>&nbsp;<label for='answer-id-1907' id='answer-label-1907' class=' answer label-11'><span class='answer'>sodium carbonate<\/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>Carbon, diamond and graphite are together called<\/p>\n<\/div><input type='hidden' name='question_id[]' value='429' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1900' \/><div class='watu-question-choice'><input type='radio' name='answer-429[]' id='answer-id-1900' class='answer answer-12  answerof-429' value='1900' \/>&nbsp;<label for='answer-id-1900' id='answer-label-1900' class=' answer label-12'><span class='answer'>isomers<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1902' \/><div class='watu-question-choice'><input type='radio' name='answer-429[]' id='answer-id-1902' class='answer answer-12  answerof-429' value='1902' \/>&nbsp;<label for='answer-id-1902' id='answer-label-1902' class=' answer label-12'><span class='answer'>isotopes<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1899' \/><div class='watu-question-choice'><input type='radio' name='answer-429[]' id='answer-id-1899' class='answer answer-12  answerof-429' value='1899' \/>&nbsp;<label for='answer-id-1899' id='answer-label-1899' class=' answer label-12'><span class='answer'>allotropes<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1901' \/><div class='watu-question-choice'><input type='radio' name='answer-429[]' id='answer-id-1901' class='answer answer-12  answerof-429' value='1901' \/>&nbsp;<label for='answer-id-1901' id='answer-label-1901' class=' answer label-12'><span class='answer'>isomorphs<\/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>Among the various allotropes of carbon,<\/p>\n<\/div><input type='hidden' name='question_id[]' value='415' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1845' \/><div class='watu-question-choice'><input type='radio' name='answer-415[]' id='answer-id-1845' class='answer answer-13  answerof-415' value='1845' \/>&nbsp;<label for='answer-id-1845' id='answer-label-1845' class=' answer label-13'><span class='answer'>diamond is the hardest, lamp black is the softest<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1844' \/><div class='watu-question-choice'><input type='radio' name='answer-415[]' id='answer-id-1844' class='answer answer-13  answerof-415' value='1844' \/>&nbsp;<label for='answer-id-1844' id='answer-label-1844' class=' answer label-13'><span class='answer'>diamond is the hardest, graphite is the softest<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1843' \/><div class='watu-question-choice'><input type='radio' name='answer-415[]' id='answer-id-1843' class='answer answer-13  answerof-415' value='1843' \/>&nbsp;<label for='answer-id-1843' id='answer-label-1843' class=' answer label-13'><span class='answer'>diamond is the hardest, coke is the softest<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1842' \/><div class='watu-question-choice'><input type='radio' name='answer-415[]' id='answer-id-1842' class='answer answer-13  answerof-415' value='1842' \/>&nbsp;<label for='answer-id-1842' id='answer-label-1842' class=' answer label-13'><span class='answer'>coke is the hardest, graphite is the softest<\/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>Monazite is an ore of<\/p>\n<\/div><input type='hidden' name='question_id[]' value='428' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1896' \/><div class='watu-question-choice'><input type='radio' name='answer-428[]' id='answer-id-1896' class='answer answer-14  answerof-428' value='1896' \/>&nbsp;<label for='answer-id-1896' id='answer-label-1896' class=' answer label-14'><span class='answer'>zirconium<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1898' \/><div class='watu-question-choice'><input type='radio' name='answer-428[]' id='answer-id-1898' class='answer answer-14  answerof-428' value='1898' \/>&nbsp;<label for='answer-id-1898' id='answer-label-1898' class=' answer label-14'><span class='answer'>thorium<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1895' \/><div class='watu-question-choice'><input type='radio' name='answer-428[]' id='answer-id-1895' class='answer answer-14  answerof-428' value='1895' \/>&nbsp;<label for='answer-id-1895' id='answer-label-1895' class=' answer label-14'><span class='answer'>titanium<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1897' \/><div class='watu-question-choice'><input type='radio' name='answer-428[]' id='answer-id-1897' class='answer answer-14  answerof-428' value='1897' \/>&nbsp;<label for='answer-id-1897' id='answer-label-1897' class=' answer label-14'><span class='answer'>iron<\/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>When an iron nail gets rusted, iron oxide is formed<\/p>\n<\/div><input type='hidden' name='question_id[]' value='412' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1830' \/><div class='watu-question-choice'><input type='radio' name='answer-412[]' id='answer-id-1830' class='answer answer-15  answerof-412' value='1830' \/>&nbsp;<label for='answer-id-1830' id='answer-label-1830' class=' answer label-15'><span class='answer'>without any change in the weight of the nail<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1831' \/><div class='watu-question-choice'><input type='radio' name='answer-412[]' id='answer-id-1831' class='answer answer-15  answerof-412' value='1831' \/>&nbsp;<label for='answer-id-1831' id='answer-label-1831' class=' answer label-15'><span class='answer'>with decrease in the weight of the nail<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1833' \/><div class='watu-question-choice'><input type='radio' name='answer-412[]' id='answer-id-1833' class='answer answer-15  answerof-412' value='1833' \/>&nbsp;<label for='answer-id-1833' id='answer-label-1833' class=' answer label-15'><span class='answer'>without any change in colour or weight of the nail<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1832' \/><div class='watu-question-choice'><input type='radio' name='answer-412[]' id='answer-id-1832' class='answer answer-15  answerof-412' value='1832' \/>&nbsp;<label for='answer-id-1832' id='answer-label-1832' class=' answer label-15'><span class='answer'>with increase in the weight of the nail<\/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>The group of metals Fe, Co, Ni may best called as<\/p>\n<\/div><input type='hidden' name='question_id[]' value='417' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1854' \/><div class='watu-question-choice'><input type='radio' name='answer-417[]' id='answer-id-1854' class='answer answer-16  answerof-417' value='1854' \/>&nbsp;<label for='answer-id-1854' id='answer-label-1854' class=' answer label-16'><span class='answer'>rare metals<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1852' \/><div class='watu-question-choice'><input type='radio' name='answer-417[]' id='answer-id-1852' class='answer answer-16  answerof-417' value='1852' \/>&nbsp;<label for='answer-id-1852' id='answer-label-1852' class=' answer label-16'><span class='answer'>main group metals<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1851' \/><div class='watu-question-choice'><input type='radio' name='answer-417[]' id='answer-id-1851' class='answer answer-16  answerof-417' value='1851' \/>&nbsp;<label for='answer-id-1851' id='answer-label-1851' class=' answer label-16'><span class='answer'>transition metals<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1853' \/><div class='watu-question-choice'><input type='radio' name='answer-417[]' id='answer-id-1853' class='answer answer-16  answerof-417' value='1853' \/>&nbsp;<label for='answer-id-1853' id='answer-label-1853' class=' answer label-16'><span class='answer'>alkali metals<\/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>The most important ore of aluminium is<\/p>\n<\/div><input type='hidden' name='question_id[]' value='436' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1936' \/><div class='watu-question-choice'><input type='radio' name='answer-436[]' id='answer-id-1936' class='answer answer-17  answerof-436' value='1936' \/>&nbsp;<label for='answer-id-1936' id='answer-label-1936' class=' answer label-17'><span class='answer'>calamine<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1935' \/><div class='watu-question-choice'><input type='radio' name='answer-436[]' id='answer-id-1935' class='answer answer-17  answerof-436' value='1935' \/>&nbsp;<label for='answer-id-1935' id='answer-label-1935' class=' answer label-17'><span class='answer'>galena<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1938' \/><div class='watu-question-choice'><input type='radio' name='answer-436[]' id='answer-id-1938' class='answer answer-17  answerof-436' value='1938' \/>&nbsp;<label for='answer-id-1938' id='answer-label-1938' class=' answer label-17'><span class='answer'>bauxite<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1937' \/><div class='watu-question-choice'><input type='radio' name='answer-436[]' id='answer-id-1937' class='answer answer-17  answerof-436' value='1937' \/>&nbsp;<label for='answer-id-1937' id='answer-label-1937' class=' answer label-17'><span class='answer'>calcite<\/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>The chemical (ethyl mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of<\/p>\n<\/div><input type='hidden' name='question_id[]' value='422' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1873' \/><div class='watu-question-choice'><input type='radio' name='answer-422[]' id='answer-id-1873' class='answer answer-18  answerof-422' value='1873' \/>&nbsp;<label for='answer-id-1873' id='answer-label-1873' class=' answer label-18'><span class='answer'>chlorine<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1871' \/><div class='watu-question-choice'><input type='radio' name='answer-422[]' id='answer-id-1871' class='answer answer-18  answerof-422' value='1871' \/>&nbsp;<label for='answer-id-1871' id='answer-label-1871' class=' answer label-18'><span class='answer'>bromine<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1874' \/><div class='watu-question-choice'><input type='radio' name='answer-422[]' id='answer-id-1874' class='answer answer-18  answerof-422' value='1874' \/>&nbsp;<label for='answer-id-1874' id='answer-label-1874' class=' answer label-18'><span class='answer'>sulphur<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1872' \/><div class='watu-question-choice'><input type='radio' name='answer-422[]' id='answer-id-1872' class='answer answer-18  answerof-422' value='1872' \/>&nbsp;<label for='answer-id-1872' id='answer-label-1872' class=' answer label-18'><span class='answer'>fluorine<\/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>Which of the following is in liquid form at room temperature?<\/p>\n<\/div><input type='hidden' name='question_id[]' value='444' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1963' \/><div class='watu-question-choice'><input type='radio' name='answer-444[]' id='answer-id-1963' class='answer answer-19  answerof-444' value='1963' \/>&nbsp;<label for='answer-id-1963' id='answer-label-1963' class=' answer label-19'><span class='answer'>Lithium<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1964' \/><div class='watu-question-choice'><input type='radio' name='answer-444[]' id='answer-id-1964' class='answer answer-19  answerof-444' value='1964' \/>&nbsp;<label for='answer-id-1964' id='answer-label-1964' class=' answer label-19'><span class='answer'>Sodium<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1965' \/><div class='watu-question-choice'><input type='radio' name='answer-444[]' id='answer-id-1965' class='answer answer-19  answerof-444' value='1965' \/>&nbsp;<label for='answer-id-1965' id='answer-label-1965' class=' answer label-19'><span class='answer'>Francium<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1966' \/><div class='watu-question-choice'><input type='radio' name='answer-444[]' id='answer-id-1966' class='answer answer-19  answerof-444' value='1966' \/>&nbsp;<label for='answer-id-1966' id='answer-label-1966' class=' answer label-19'><span class='answer'>Cerium<\/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>Potassium nitrate is used in<\/p>\n<\/div><input type='hidden' name='question_id[]' value='430' \/><div class='watu-questions-wrap '><input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1905' \/><div class='watu-question-choice'><input type='radio' name='answer-430[]' id='answer-id-1905' class='answer answer-20  answerof-430' value='1905' \/>&nbsp;<label for='answer-id-1905' id='answer-label-1905' class=' answer label-20'><span class='answer'>salt<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1903' \/><div class='watu-question-choice'><input type='radio' name='answer-430[]' id='answer-id-1903' class='answer answer-20  answerof-430' value='1903' \/>&nbsp;<label for='answer-id-1903' id='answer-label-1903' class=' answer label-20'><span class='answer'>medicine<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1904' \/><div class='watu-question-choice'><input type='radio' name='answer-430[]' id='answer-id-1904' class='answer answer-20  answerof-430' value='1904' \/>&nbsp;<label for='answer-id-1904' id='answer-label-1904' class=' answer label-20'><span class='answer'>fertilizer<\/span><\/label><\/div>\n<input type='hidden' name='answer_ids[]' class='watu-answer-ids' value='1906' \/><div class='watu-question-choice'><input type='radio' name='answer-430[]' id='answer-id-1906' class='answer answer-20  answerof-430' value='1906' \/>&nbsp;<label for='answer-id-1906' id='answer-label-1906' class=' answer label-20'><span class='answer'>glass<\/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\" 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