Q. Cloud is a colloidal dispersion of

Explanation by: Ram Sharma

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 Questions and Answers
4096.  Heavy water is

A
  Deuterium

B
 Deuterium oxide

C
 Tritium oxide

D
 Rain water

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4097.  A thick paste of cement, sand & water is called

A
  Mortar

B
 R.C.C.

C
 Kiln

D
 Concrete


 
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Answer & Explanation
Answer : Option A
Explanation :
Mortar.Mortar is a workable paste used to bind construction blocks together & fill the gaps between them. Modern mortars are typically made from a mixture of sand, a binder such as cement or lime, & water.
4098.  Tear gas used by the police to disperse the mob contains

A
  hydrogen sulphide

B
 chlorine

C
 ammonia

D
 carbon dioxide

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Answer & Explanation
Answer : Option B
Explanation :
chlorine.Tear gas is a compound. The compound 2- chlorobenzalmalononitrile, a cyanocarbon, is the defining component of a 'tear gas' commonly referred to as CS gas, which is used as a riot control agent. Each molecule of tear gas contains one atom of chlorine.
4099.  Choose the inright statement from the following:

A
  Nuclei with atomic number greater than 82 show a tendency to disintegrate

B
 The nuclear force becomes very strong if the nucleus contains a large number of nucleons

C
 The nuclear force becomes weak if the nucleus contains too many protons compared to the number of neutrons

D
 The nuclear force becomes weak if the nucleus contains too many neutrons compared to the number of protons


 
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Answer & Explanation
Answer : Option B
Explanation :
4100.  Cloud is a colloidal dispersion of

A
  Mist in a dispersion medium of air

B
 Air in a dispersion medium of water

C
 Water drops in a dispersion medium of air

D
 Fog in a dispersion medium of water

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Answer & Explanation
Answer : Option C
Explanation :
A colloid is a substance microscopically dispersed evenly throughout another substance. A colloidal system consists of two separate phases: a dispersed phase (or internal phase) & a continuous phase (or dispersion medium) in which the colloid is dispersed. A colloidal system may be solid, liquid, or gas. Cloud is a colloidal dispersion of Water drops in a dispersion medium of air.