MediumPhysics
+4 / -1
-- 17. An ideal hydrogen gas is maintained in a chamber at 0°C. The root mean square speed of its hydrogen molecules is 3180 m/s. If density of hydrogen gas at 0°C is 8.99 x 10^-2 kg/m^3, then pressure of the gas is
A
3 atm
B
6 atm
C
7 atm
D
1 atm
Explanation
v_rms = √(3P/ρ) => P = (v_rms^2 * ρ) / 3 = (3180^2 * 8.99e-2) / 3 ≈ (10,112,400 * 0.0899) / 3 ≈ 909,104 / 3 ≈ 303,035 Pa. Since 1 atm ≈ 1.01 * 10^5 Pa, P ≈ 3 atm.
Previous
-- 16. In the cyclic process shown in the pressure-volume diagram, an ideal gas
NextAt what temperature will the average kinetic energy of gas molecules become twic
More from PYQ2025
Easy
Which of the following is not the unit of length :
Medium-- The speed of light in a medium is 1.5 × 10⁸ m/s. The critical angle for this medium with respect
MediumThe frequency of an electromagnetic wave in free space is 2 MHz. When it passes through a medium of
Easy-- In a p-type semiconductor, the majority charge carriers are
Easy-- The energy of an electron in nth orbit of hydrogen atom is E_n = -13.6/n² eV. The energy required
Medium-- Two magnets of magnetic moments M and 2M are placed in a vibration magnetometer, with like poles
Practice Physics Exams
Full-length mock tests with detailed analytics, rank, and percentile.
Browse Exams