4 moles of A are mixed with 4 moles of B. At equilibrium for the raction `A+BhArrC+D`, 2 moles of C and D are formed. The equilibrium constant for the reaction will be

Options

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

Answer

A

Explanation

Given `" " A+B rarr C+D`
initial conc . `4" "4 " " 0" "0`
at equilibrium (4-2) (4-2) `" " ` 2` " " `2
i.e `" " 2 " " 2 " " 2" "2 `
`:. " " K_((eq)) = (2xx 2)/(2xx 2) =1`