In which of the following reactions, the equilibrium reamins unaffected on addition of small amount of argon at constant volume?

Options

A. `H_(2(g))+I_(2) (g) Leftrightarrow 2HI(g)`
B. `PCl_(5) (g) Leftrightarrow PCl_(3) (g)+Cl_(2) (g)`
C. `N_(2) (g)+3H_(2) (g) Leftrightarrow 2NH_(3) (g)`
D. The equilibrium will remain unaffected in all the three cases

Answer

D

Explanation

In these reactions, at constant volume
`H_(2)(g)+I_(2) (g) Leftrightarrow 2HI(g)`
`PCl_(5) (g)+PCl_(3) (g)+Cl_(2) (g)`
`N_(2) (g)+3H_(2) 2NH_(3) (g)`
The equilibrium constant (K) remains unaffected on addition of inert gas in all the three cases.