Q81 / 90 · JEE Main 2019 (09 Apr Shift 1) · Physics

For given gas at 1 atm pressure, rms  speed of the molecules is 200 m/s at 127°C. At 2 atm pressure and at 227° C, the rms speed of the molecules will be:

  • A
    100 m/s
  • B
    80 m/s
  • C
    805 m/s
  • Correct answer
    D
    1005 m/s

Solution

Vrms=3RTM ⇒Vrms∝T
V1V2=T1T2
200V2=400500
V2=1005 m/s

Hence, the correct answer is option: 'D'.

Relevant Questions