50 Most Expected General Knowledge (Science) Questions in Competitive Examinations

50 Most Expected General Knowledge (Science) Questions in Competitive Examinations

31) Potassium Permanganate is used for purifying drinking water, because
A. it is a sterilising agent
B. it dissolves the impurities of water
C. it is a reducing agent
D. it is an oxidising agent

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Answer Option D

32) Which of the following is an element?
A. Ruby
B. Sapphire
C. Emerald
D. Diamond

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Answer Option D

33) Which of the following metals remain in liquid for under normal conditions?
A. Radium
B. Zinc
C. Uranium
D. Mercury

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Answer Option D

34) Which of the following is not an isotope of hydrogen?
A. Tritium
B. Deuterium
C. Protium
D. Yttrium

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Answer Option D

35) Amalgams are
A. highly coloured alloys
B. alloys which contain mercury as one of the contents
C. alloys which have great resistance to abrasion
D. alloys which contain carbon

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Answer Option B

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