E-PolyLearning

521. Sudden expansion of gases is called
a. Diffusion
b. Effusion
c. Joule Thomson effect
d. None of above
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Answer: (c).Joule Thomson effect

522. All gases can be compressed by
a. Increasing pressure
b. Decreasing pressure
c. No change in pressure
d. Keeping pressure constant
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Answer: (a).Increasing pressure

523. Escape of gas molecules through a small opening into region of low pressure is called
a. Diffusion
b. Effusion
c. Boiling point
d. Melting point
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Answer: (b).Effusion

524. The solids are non-compressible and they show
a. Maximum diffusion
b. Minimum diffusion
c. Slow diffusion
d. No diffusion
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Answer: (d).No diffusion

525. Intermolecular forces give particular properties to the substances
a. Chemical
b. Physical
c. Adhesive
d. Cohesive
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Answer: (b).Physical