(d) For monoatomic gas, $\gamma_{2} = \frac{C_{p}}{C_{v}} = 1.67$ For diatomic gas, $\gamma_{2} = \frac{C_{p}}{C_{v}} = 1.40$ $\therefore\ \gamma_{1}:\gamma_{2} = \frac{1.67}{1.40} = 1.19:1$
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.