Question

Mass action rato or reaction quotient Q for a reaction can be calculate using the law of masss action
`A(g)+B(g) hArr C(g)+D(g)`
`Q=([C][D])/([A][B])`
The value of Q decides whether the reaction is at equilibrium or not.
At equilibrium, `Q=K`
For an equilibrium process, `Q ne K`
when `Q gt K`, reaction will favour backward direction and when `Q lt K`, it will favour direction.
Answer the following questions:
The reaction quotient Q for:
`O_(2)(g)+2H_(2)(g) hArr 2H_(2)O(g)`
is given by `Q=([H_(2)O]^(2))/([O_(2)][H_(2)]^(2))`. The reaction will proceed in backward direction, when
A. `Q=K_(c)`
B. `Q lt K_(c)`
C. `Q gt K_(c)`
D. `Q=0`

Answer 1

Correct Answer - C
When `Q gt K`, the reaction proceeds in backward direction.