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Solution


Q.

N moles of a polyatomic gas (f = 6) must be mixed with two moles of a monoatomic gas so that the mixture behaves as a diatomic gas. The value of N is                      [2024]
1 4  
2 3  
3 6  
4 2  

Ans.

(1) 

        feq=n1f1+n2f2n1+n2

         For diatomic gas feq=5

        5=(N)(6)+(2)(3)N+2

        5N+10=6N+6⇒N=4