Question

Upon heating gases become lighter why ? [ ]

a) increase in molecular spaces b) decrease in molecular spaces

c) breaking of molecules d) formation of new molecules​

Answer 1

Answer:

options a is correct

Explanation:

On heating, molecules gain kinetic energy, their distance of interaction increases due to the random motion. Hence they lead to expansion due to random motion and are lighter due to decrease in density.

Answer 2

Answer:

a. increase in molecular spaces.

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