Question

A temperature at which rms speed of SO2 molecules is half of that of helium molecules at 300 K –

• A. 1200 K
• B. 600 K
• C. 800 K
• D. 900 K

Answer 1

Answer: (A)

1200 K

Answer 2

$\mathrm { r } _ { \mathrm { SO } _ { 2 } }$ = $\sqrt { \frac { 3 \mathrm { RT } } { 64 } }$ ; r_He =

\ = 2 $\sqrt { \frac { 3 \mathrm { RT } } { 64 } }$

or = 4 ×

or T = $\frac { 64 } { 16 }$ × 300 = 1200 K