If, in the reaction `N_(2)O_(4) harr 2NO_(2)` x is that part of `N_(2) O_(4)` which dissociates, then the number of molecules at equilibrium will be

Options

A. 1
B. 3
C. `(1 + x)`
D. `(1 + x)^(2)`

Answer

c

Explanation

No. of moles before dissociation No.
of moles after dissociation
`underset(1-x)underset(1)(N_(2)O_(4)) harr underset(2x)underset(0)(2NO_(2))`
Total number of moles at equilibrium`= 1-x+ 2x = 1 +x`