A gas mixture consists of $$2$$ moles of $$O_2$$ and $$4$$ moles of $$Ar$$ at temperature $$T.$$ Neglecting all the vibrational modes, the total internal energy of the system is:

 1 $$15RT$$ 2 $$9RT$$ 3 $$11RT$$ 4 $$4RT$$
Subtopic: Â Law of Equipartition of Energy |
Â 77%
From NCERT
NEET - 2017
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The value $$\gamma = \frac{C_P}{C_V}$$ for hydrogen, helium, and another ideal diatomic gas $$X$$ (whose molecules are not rigid but have an additional vibrational mode), are respectively equal to:
1. $$\frac{7}{5}, \frac{5}{3}, \frac{9}{7}$$
2. $$\frac{5}{3}, \frac{7}{5}, \frac{9}{7}$$
3. $$\frac{5}{3}, \frac{7}{5}, \frac{7}{5}$$
4. $$\frac{7}{5}, \frac{5}{3}, \frac{7}{5}$$

Subtopic: Â Law of Equipartition of Energy |
Â 56%
From NCERT
NEET - 2019
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\begin{align} & {{1}{.}\;\frac{5}{2}{R}}\\ & {{2}{.}\;\frac{3}{2}{R}}\\ & {{3}{.}\;\frac{7}{2}{R}}\\ & {{4}{.}\;\frac{9}{2}{R}} \end{align}