When one mole of A and one mole of B were heated in a one litre flask at T(K), 0.5 moles of C were formed at equilibrium
`A+B hArr C+D`
The equilibrium constant `K_(C)` is

Options

A. 0.25
B. 0.5
C. 1
D. 2

Explanation

`"Intial moles Moles at equili", underset(1-x)underset(1)(A)+underset(1-x)underset(1)(B)rArrunderset(x)underset(0)(C ) + underset(x)underset(0)(D)`
`"Given", " " x = 0.5 mol`
`therefore " " (1-x) = 0.5 mol`
`rArr " " K_( C) =([C][D])/([A][B])=(0.5xx0.5)/(0.5xx0.5)=1`