Solutions and Surface Chemistry MCQ question and answer with solution

1

A solution which contains the maximum amount of the solute that can be dissolved in a given amount of solvent at a particular temperature is called

A) saturated solution B) unsaturated solution C) supersaturated solution D) none of the above

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Answer & Solution

Answer: Option A

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2

Azeotropic mixtures are

A) mixture of two solids B) those which boil at different temperatures C) those which can be fractionally distilled D) the constant boiling mixture

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Answer & Solution

Answer: Option D

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3

The process of diffusion in gases take place due to the

A) difference in their densities B) difference in their composition C) equal in densities D) All of the above

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Answer & Solution

Answer: Option A

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4

The process of separating of cream from milk is called

A) electro-osmosis B) emulsion C) emulsification D) demulsification

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Answer & Solution

Answer: Option D

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5

Which one of the following statements is not correct?

A) The boiling point of an aqueous solution is highter than that of pure water B) Addition of solutes to a solution causes an increase in its water potential C) The vapour pressure of the water in a solution is lower than that of pure water D) When a solution is separated from water by a semi-permeable membrane water starts movement

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Answer & Solution

Answer: Option B

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6

Cloud is a colloidal dispersion of

A) air in a dispersion medium of water B) fog in a dispersion mediumof water C) mist in a dispersion medium of air D) water drops in a dispersion medium of air

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Answer & Solution

Answer: Option D

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7

Which one of the following colloidal systems is represented by soda water?

A) Liquid in gas B) Gas in liquid C) Solid in gas D) Liquid in liquid

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Answer & Solution

Answer: Option B

Solution:

The correct answer is Option B: Gas in liquid.

Here's why:

* A colloidal system is a mixture where one substance is dispersed evenly throughout another.

* Soda water is essentially carbon dioxide gas (CO₂) dissolved in water (a liquid).

* Therefore, soda water represents a gas (CO₂) dispersed in a liquid (water).

Let's look at why the other options are incorrect:

* Option A: Liquid in gas This would be something like fog or mist, where tiny liquid droplets are suspended in air (a gas).

* Option C: Solid in gas This would be something like smoke, where tiny solid particles are suspended in air.

* Option D: Liquid in liquid This would be an emulsion, like milk, where tiny droplets of one liquid are dispersed in another liquid.

So, to remember: Soda water = Gas (Carbon Dioxide) in Liquid (Water).

8

Which one of the following is the best example of desiccant?

A) Silica gel B) Polystyrene C) Sodium chloride D) Sodium carbonate

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Answer & Solution

Answer: Option A

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9

Which one of the following is not the result of surface tension?

A) Vapour formation above the liquid surface B) Convex shape of liquid meniscus C) Liquid rising in a capillary D) Spherical shape of mercury fallen on the floor

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Answer & Solution

Answer: Option A

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10

When oil floats on water, the surface tension of water

A) vanishes immediately B) decreases considerably C) increases considerably D) remains unaffected

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Answer & Solution

Answer: Option D

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Solutions and Surface Chemistry MCQ question and answer with solution | Chemistry Gk MCQs