Chemistry Practice Question and Answer
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Q:Read the following questions carefully and answer them.
The isotope of Uranium used in atomic reactors is
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63aaabe3e541fa7a01223f5f- 1$$U^235$$true
- 2$$U^236$$false
- 3$$U^237$$false
- 4$$U^232$$false
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Answer : 1. "$$U^235$$ "
Q: The litmus dye is purple in color, which is removed?
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5f697e9cf9079a64e3a51e91- 1Redfalse
- 2Lichentrue
- 3Cabbage Turmericfalse
- 4Petunia flowerfalse
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Answer : 2. "Lichen"
Q: Gold is used to make jewelery?
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61275c5e302e8b067c99c5ab- 122 caratstrue
- 224 caratfalse
- 316 caratsfalse
- 423 caratsfalse
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Answer : 1. "22 carats"
Q: Which of the following is not correct about diffusion?
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5f869edfb7ad805e26c102b6- 1The rate of diffusion of gases is higher than that of solid and liquid.false
- 2Diffusion is possible only when the particles of matter are in constant motion.false
- 3The rate of diffusion of gases depends on their volume.true
- 4Particles in diffusion move from high concentration to low concentration.false
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Answer : 3. "The rate of diffusion of gases depends on their volume."
Q: Which one of the following substance is used in photography and also as an antichlor ?
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6245534c398e4a497b3e9570- 1Chrome redfalse
- 2Sodium thisosulphatetrue
- 3Hydrogen peroxidefalse
- 4Calomelfalse
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Answer : 2. "Sodium thisosulphate "
Q: _______ expansion makes the Eiffel Tower taller during summers.
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62bec77225fd051a65657af2- 1Gravitationalfalse
- 2Gradientfalse
- 3Chemicalfalse
- 4Thermaltrue
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Answer : 4. "Thermal"
Q: What is the more common name for solid carbon dioxide?
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62bea9681d322d793f52a911- 1Quick Silverfalse
- 2Epsomfalse
- 3Potashfalse
- 4Dry Icetrue
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Answer : 4. "Dry Ice"
Q: Which of the following methods is best suited for the separation of a mixture containing naphthalene and benzoic acid
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63c8f8d3bdbddb32fda0eb03- 1Crystallizationfalse
- 2Chromatographyfalse
- 3Sublimationtrue
- 4Distillationfalse
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Answer : 3. "Sublimation"
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