An electric lamp is filled with an ideal gas having density and pressure

CHEMISTRY · Single correct · AP · Chemistry · Properties of Substances and Mixtures · Properties of Substances and Mixtures

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 : (1) 200 (2) 300 (3) 100 (4) 400