During expansion of a gas at a fixed temperature ?
A
There occurs a decrease in pressure
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B
There is no change in K.E. of the molecules of gas
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C
There occurs a decrease in K.E. of the gaseous molecules
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D
There occurs an increase in number of gas molecules
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Solution
The correct option is B There is no change in K.E. of the molecules of gas Since temperature is kept constant so pressure decrease causes the volume to increase.
K.E. remains unchanged (K.E.∝T)
Number of gas molecules remains constant during expansion.