If the temperature of gas molecules is raised from $127^{\circ} C$ to $527^{\circ} C$,the ratio of the r.m.s. speed of the molecules is respectively:

  • A
    $1: 2$
  • B
    $2: 1$
  • C
    $1: \sqrt{2}$
  • D
    $2: \sqrt{2}$

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