JEE Main 2022 · 30 Jul · Shift 2 · Physics Q8

PhysicsSingle correct+4 / -1Question 8 of 90

If the r.m.s speed of oxygen at room temperature is $\sqrt{56}$ m/s. The r.m.s speed of nitrogen at the same temperature is _______.

8\sqrt2

m/s

8 m/s

16 m/s

7 m/s

Answer and worked solution

Official answer: B

rms speed ∝ $1/\sqrt M$ : $\sqrt{56\times\frac{32}{28}}=\sqrt{64}=8$ m/s.

(B)

Topics:Molecular speeds

JEE Main 2022 · 30 Jul · Shift 2, Physics question 8