By how many folds the temperature of a g...

By how many folds the temperature of a gas would increase when the r.m.s. velocity of gas molecules in a closed container of fixed volume is increased from `5 xx 10^(4) cm s^(-1) " to " 10 xx 10^(4) cm s^(-1)`?

0.5 times

2 times

4 times

16 times

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