Chemistry - Questions and Answers, General Study (GK)

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141.

Molten NaCl is good conductor of electricity is due to

(a)Free electrons

(b)Free ions

(c)Free molecules

(d)None of these

Comment

Answer is: BNA

142.

Azeotropic mixtures are

(a)Mixture of two solids

(b)Those which boil at different temperatures

(c)Those which can be fractionally distilled

(d)Constant boiling mixture

Comment

Answer is: DNA

143.

If glycerol and methanol were sold at the same price in market, which would be cheaper for preparing an anti-freeze solution for the radiator of an auto-mobile?

(a)Glycerol

(b)Methanol

(c)Both are equal

(d)None of these

Comment

Answer is: BNA

144.

Which of the following colloidal solution is commonly used as germ killer?

(a)Colloidal sulphur

(b)Colloidal gold

(c)Colloidal silver

(d)Colloidal antimony

Comment

Answer is: ANA

145.

Butter is a colloid formed when

(a)Fat is dispersed in water

(b)Fat globules are dispersed in water

(c)Water is disperse in fat

(d)Suspensions of casein in water

Comment

Answer is: CNA

146.

The solubility of a gas in liquid increase with

(a)Increase in temperature

(b)Reduction in gas pressure

(c)Decrease in temperature and increase in gas pressure

(d)Amount of liquid taken

Comment

Answer is: CNA

147.

Isotonic solution have the some

(a)Normality

(b)Molar concentration

(c)Strength

(d)Density

Comment

Answer is: BNA

148.

The solution of rubber is an example of

(a)Lyophobic colloid

(b)Multimolecular colloid

(c)Associated colloid

(d)Macromolecular colloid

Comment

Answer is: DNA

149.

If detergent is added

(a)Surface tension decreases

(b)Surface tension increases

(c)Surface tension can increase or decrease

(d)No effect

Comment

Answer is: ANA

150.

Blood has been found isotonic with

(a)Saturated solution of NaCl

(b)Saturated solution of KCl

(c)Saturated solution of 1:1 mixture of NaCl and KCl

(d)Normal sodium chloride solution

Comment

Answer is: DNA

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Chemistry - Questions and AnswersPage 15

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