Which of the following is an element
Answer: D
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Cutting and peeling of onion brings tears to the eyes because of the presence of _____ ?
Answer: B
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The main chemical constituent of clay is
Answer: D
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The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is
Answer: C
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The process that takes place in the atom bomb is
Answer: B
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The absolute value of charge on electron was determined by
Answer: B
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Hydrogen bomb is based on the principle of
Answer: B
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Leakage of which of the following gases caused the Bhopal gas tragedy ?
Answer: B
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The metal that is usually extracted from sea water is
Answer: D
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Chloroform used as anaesthetic should be preserved in the dark in tightly stoppered bottles because otherwise
Answer: C
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