Chemistry Questions Practice Question and Answer
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Q: Impure camphor is purified by
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5ed8d0e4e4997750bdbabbef- 1sublimationtrue
- 2fractional crystallizationfalse
- 3fractional distillationfalse
- 4steam distillationfalse
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Answer : 1. "sublimation"
Q: Who is called the father of modern chemistry?
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5ef430d7bea49d16b47d5818- 1Daltonfalse
- 2Lavoisiertrue
- 3Mendeleevfalse
- 4None of thesefalse
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Answer : 2. "Lavoisier"
Q: What is the role of a positive catalyst in a chemical reaction?
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5ed8d7d354f88e519fa2312f- 1It increases the rate of reactiontrue
- 2It decreases the rate of reactionfalse
- 3It increases the yield of the productsfalse
- 4It provides better purity of the productsfalse
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Answer : 1. "It increases the rate of reaction "
Q: Milk is a natural
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5ed63d274bd6e60aba33c8a4- 1Solutionfalse
- 2Mixturefalse
- 3Suspensionfalse
- 4Emulsiontrue
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Answer : 4. "Emulsion "
Q: The gas used for artificial fruit ripening of green fruit is
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5ed634c2436d8a49583c72fa- 1Ethanefalse
- 2Ethylenefalse
- 3Methanefalse
- 4Acetylenetrue
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Answer : 4. "Acetylene "
Q: What is the main raw material in glass?
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5ed5f57b5ccf7008ed8ca454- 1Copperfalse
- 2Zinkfalse
- 3Cadmiumfalse
- 4Silicatrue
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Answer : 4. "Silica"
Q: Which is the purest form of iron?
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5ed8a86454f88e519fa1af9a- 1Steelfalse
- 2Cast ironfalse
- 3Pig ironfalse
- 4Wrought irontrue
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Answer : 4. "Wrought iron "
Q: Which one of the following polymer is used in making bullet - proof vest?
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5f06e6dfb13c2d244adae1f1- 1Teflonfalse
- 2Polyurethanefalse
- 3Bakelitefalse
- 4Polyamidetrue
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Answer : 4. "Polyamide "
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