`4` moles of A are mixed with `4` moles of B, when `2` moles of C are formed at equilibrium according to the reaction `A+B hArr C+D`.
The value of equilibrium constant is

Options

A. `(1)/(4)`
B. `(1)/(2)`
C. `1`
D. `4`

Answer

C

Explanation

`{:(,,A,+,B,hArr,C,+,D),("Initial conc.",,4,,4,,0,,0),("After T time conc.",,(4-2),,(4-2),,2,,2):}`
Equilibrium constant `= ([C][D])/([A][B]) = (2xx2)/(2xx2) = 1`