question_answer

If\[min\{x+1,|~x|+1\}\]and\[f\{x\}\ge 1\]denote the specific heats of nitrogen per unit mass at constant pressure and constant volume respectively, then                         [AIEEE 2007]

A)  \[x\in R\]

B)       \[f(x)\]

C)  \[x=1\]

D)       \[f(x)\]

Correct Answer: A

Solution :

[a] According to Mayer's relation,

(for 1 mole)

As molecular weight of Ng gas is 28.