Chemistry Practice Question and Answer
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Q: A radio-active substance has a half life of six months. Three-fourth of the substance will decay in____.
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5f48d6b3e7f09063e630a3d9- 1Six monthsfalse
- 2Ten monthsfalse
- 3Twelve monthstrue
- 4Twenty four monthsfalse
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Answer : 3. "Twelve months"
Q: Acetic acid is known as ________.
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5f48cf7fcebf7d1232e8bc28- 1Caustic sodafalse
- 2Vinegartrue
- 3Baking sodafalse
- 4Spiritfalse
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Answer : 2. "Vinegar"
Q: What are the main components of Brass Alloy?
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5f43818597c6dd29b38f3769- 1Copper and Zinctrue
- 2Copper, Zinc and Nickelfalse
- 3Copper and Strontiumfalse
- 4Copper and Nickelfalse
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Answer : 1. "Copper and Zinc"
Q: Alkali metal can
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5f437f8497c6dd29b38f2e3f- 1Be highly unstable at room temperaturefalse
- 2vaporize at room temperaturefalse
- 3easily lose electronstrue
- 4easily gain electronsfalse
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Answer : 3. "easily lose electrons "
Q: Kerosene oil rises up in the wick of lantern because of
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5f43626009e4377de92e96d0- 1The gravitational pull of the wickfalse
- 2Surface tensiontrue
- 3Buoyant force of airfalse
- 4Diffusion of the oil through the wickfalse
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Answer : 2. "Surface tension"
Q: The flavor of apple is mainly due to which one of the following?
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5f324e5aa19eae5979fdd850- 1Ethanoltrue
- 2Acetonefalse
- 3Formalinfalse
- 4Benzenefalse
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Answer : 1. "Ethanol "
Q: The anode in a dry cell consists of
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5f2cf8de21de6a117aefee33- 1Cadmiumfalse
- 2Graphitefalse
- 3Copperfalse
- 4Zinctrue
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Answer : 4. "Zinc "
Q: Which of the following is used as a lubricant in heavy machines?
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5f2cf764be9f31290fb85b15- 1Phosphorusfalse
- 2Graphitetrue
- 3Bauxitefalse
- 4Sulphurfalse
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Answer : 2. "Graphite "
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