The temperature of an ideal gas is increased from $120\, K$ to $480\, K.$ If at $120\, K,$ the root mean square velocity of the gas molecules is $v,$ at $480\, K$ it becomes
  • A$4v$
  • B$2v$
  • C$v/2$
  • D$v/4$
IIT 1996, Easy
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