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Subject :NSO    Class : Class 3

When ammonia gas is liquefied, there is a change in the _______ of the particles.

A Mass
B Shape
C Size
D Speed


Did not understand this one please explain.

Ans 1:

Class : Class 4

Ans 2:

Class : Class 3
To liquify ammonia gas the temperature of the gas is reduced. This results into slowing down of the molecules of ammonia. Hence a change in the speed of the particles takes place.

Ans 3:

Class :
Class:-- Speed Ammonia gas is one of the liquefied by decreasing temperature and increasing pressure.

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