Chemistry - Questions and Answers, General Study (GK)

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Chemistry - Questions and AnswersPage 16

151.

Colloidal medicines are wore effective because

(a)The germs moves towards them

(b)They are cheap

(c)They are easily assimilated and adsorbed

(d)They are easy to prepare

Comment

Answer is: CNA

152.

The process of separating of cream from milk is called

(a)Electro-osmosis

(b)Emulsion

(c)Emulsification

(d)Demulsification

Comment

Answer is: DNA

153.

Blood cells do not shrink in blood because blood is

(a)Isotonic

(b)Hypertonic

(c)Hypotonic

(d)Equimolar

Comment

Answer is: ANA

154.

Muddy water is purified by adding alum due to

(a)Osmosis

(b)Emulsification

(c)Coagulation

(d)Dialysis

Comment

Answer is: CNA

155.

The pH value of the solution obtained by complete neutralization of hydrochloric and sodium hydroxide solution will be

(a)Exactly 7

(b)Zero

(c)more than

(d)Less than

Comment

Answer is: ANA

156.

Which one of the following colloidal systems in represented by fog?

(a)Liquid in gas

(b)Gas in liquid

(c)Solid in gas

(d)Liquid in liquid

Comment

Answer is: ANA

157.

The order of photochemical reaction between H₂ and Cl₂ is

(a)Zero

(b)First

(c)Second

(d)Third

Comment

Answer is: ANA

158.

Radioactive decay is

(a)First order reaction

(b)Zero order reaction

(c)Second order reaction

(d)Third order reaction

Comment

Answer is: ANA

159.

Efficiency of the catalyst depends on its

(a)Molecular state

(b)Physical state

(c)Amount used

(d)Number of free valencies

Comment

Answer is: ANA

160.

The activation energy of a reaction is zero. The rate constant for the reaction

(a)Decreases with decrease of temperature

(b)Increases with increase of temperature

(c)Decreases with increase of temperature

(d)Is nearly independent of temperature

Comment

Answer is: DNA

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Chemistry - Questions and AnswersPage 16

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