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NEET Practice Questions (MCQs) with Answers & Solutions

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Which of the following processes is adsorption phenomenon ?

A.

Soaked of rayon clothes in coloured solution

B.

Contact between silicagel and vapour of water

C.

Contact between anhydrous $ CaCl_2$ and vapour of water

D.

$ H_2 S $ gas in contact to water.

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Which of the following is good adsorbent ?

A. Silica gel B. Alumina C. Clay D. All the given

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Which type of process adsorption is ?

A. Isotonic B. Isochonic C. Indothermic D. Exothermic

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When adsorption phenomenon occurs complete ?

A. $ \triangle H \lt O, \triangle G \lt O, \triangle S \lt O $ B. $ \triangle G \lt O, \triangle H \lt O, \triangle S \gt O $ C. $ \triangle H \gt O, \triangle S \gt O, \triangle G \lt O $ D. $ \triangle G \lt O, \triangle S \lt O, \triangle H \gt O $

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Which is correct for adsorption ?

A. $ \triangle H-T \triangle S is negative $ B. $ \triangle H is positive $ C. $ \triangle H - t \triangle S is positive $ D. $ T \triangle S and \triangle G = 0 $

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Which of the following statement is not true ?

A. The value of adsorption enthalpy of physical adsorption is less than chemical adsorption. B. Physical adsorption occurs due to van der waalsâ€™ forces C. Chemical adsorption decreases at high temperature and low pressure. D. Physical adsorption is reversible.

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At which temperature chemical adsorption occurs ?

A. At high temperature B. At very low temperature C. At low temperature D. Temperature does not affect.

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Whose value is less than zero during adsoption ?

A. $ \triangle G $ B. $ \triangle H $ C. $ \triangle S $ D. All the given

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How molecules of gases are deposited on the surface of solid during physical adsorption ?

A. By electrostatic forces B. By chemical forces C. By gravitational forces D. By van der waalsâ€™ forces

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What is used to prevante electronic instruments clamaged by the moisture ?

A. Silica gel B. Zeolite C. Chromatographic plate D. All the given

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