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:
In the reaction:
`NH_(4)Cl(g) hArr NH_(3)(g)+HCl(g)`
a graph is plotted to show that the variation or the rate of forward and backward reaction against time.
Which of following is correct?

A. `Q gt K=3, Q=K=2, Q lt K=1`
B. `Q gt K=2, Q=K=3, Q lt K=1`
C. `Q gt K=1, Q=K=2, Q lt K=3`
D. `Q gt K=2, Q=K=1, Q lt K=3`

Answer 1

Correct Answer - A
In backward direction `Q gt K`
In forward direction `Q lt K`
At equilibrium `Q= K`