Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main
Exam
JEE Main
Subject
Physics
Chapter
Kinetic Theory of Gases

JEE Main · Physics · Kinetic Theory of Gases

A flask contains hydrogen and oxygen in the ratio of 2: 1 by mass...

A flask contains hydrogen and oxygen in the ratio of 2:12: 1 by mass at temperature 27∘C27^{{}^{{}^{\circ}}} \mathrm{C}. The ratio of average kinetic energy per molecule of hydrogen and oxygen respectively is :

Options

  1. A
    2 : 1
  2. B
    1 : 1
  3. C
    1 : 4
  4. D
    4 : 1

Correct answer

B.
1 : 1

Step-by-step solution

Average kinetic energy for diatomic gases
<br/>Kav=52kT<br/>∴(Kav)H(Kav)O=(27+273)(27+273)=1<br/>\begin{aligned}<br />& \mathrm{K}_{\mathrm{av}}=\frac{5}{2} \mathrm{kT} \\<br />& \therefore \frac{\left(\mathrm{K}_{\mathrm{av}}\right)_{\mathrm{H}}}{\left(\mathrm{K}_{\mathrm{av}}\right)_{\mathrm{O}}}=\frac{(27+273)}{(27+273)}=1<br />\end{aligned}
Practice Kinetic Theory of Gases on Quantrex Academy →

More from Kinetic Theory of Gases

If 2 mole of an ideal monoatomic gas at temperature T , is mixed with 6 mole of another… JEE Main 2026Given below are two statements: one is labelled as Assertion A and the other is labelled… JEE Main 2026Given below are two statements: one is labelled as Assertion A and the other is labelled… JEE Main 2026One gas of n_1 mole of molecules at temperature T_1 , volume V_1 , and pressure P_1 , and… JEE Main 2026A mixture of carbon dioxide and oxygen has volume 8310 cm ^3 , temperature 300 K… JEE Main 2026The mean free path of a molecule of diameter 5 × 10^ -10 ~m at the temperature 41^ ∘ C… JEE Main 2026A gas of certain mass filled in a closed cylinder at a pressure of 3.23 kPa has… JEE Main 2026Consider two boxes containing ideal gases A and B such that their temperatures, pressures… JEE Main 2026 Full Kinetic Theory of Gases list All Highly selective Backlog Qs for JEE Main PYQs