NEET Physics Kinetic Theory of Gases Questions Solved

A rocket is propelled by a gas which is initially at a temperature of 4000 K. The temperature of the gas falls to 1000 K as it leaves the exhaust nozzle. The gas which will acquire the largest momentum while leaving the nozzle, is 

(1) Hydrogen

(2) Helium

(3) Nitrogen

(4) Argon

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