Influence of pressure, temperature, concentration and addition of inert gas on a reversible chemical reaction in equilibrium can be explained by formulating the expression for equilibrium constant `K_(c)` or `K_(p)` for the equilibrium. On the other hand Le Chatelier principle can be theoretically used to explain the effect of `P`, `T` or concentration on the physical or chemical equilibrium both.
`n` moles of a reactant `A` gives one mole of `B` and `C`. If degree of dissociation of `A` is independent of initial concentration of `A`, then `n` is:

Options

A. `1`
B. `2`
C. `3`
D. `4`

Explanation

`underset(1-alpha)underset(1)(nA)hArrunderset(alpha//n)underset(0)(B)+underset(alpha//n)underset(0)(C)`
`:. K_(c)=(alpha^(2)*V^(n-2))/(n^(2)(1-alpha)^(n))`
If `alpha` is independent of conc., then `n-2=0 :. N=2`