Chemistry

Problem

An electric lamp is filled with an ideal gas having density

0.75\text{ kg/m}^3

and pressure

4 \times 10^4\text{ Pa}

. On switching on the lamp, the temperature of gas molecules increases so that new pressure becomes

9 \times 10^4\text{ Pa}

. The increase in

u_{\text{rms}}

of gas molecules in m/sec is : a. 200 b. 300 c. 100 d. 400