Question

The reaction quotient ($Q$) at equilibrium is:

• A. $=1$
• B. $=K$
• C. $>K$
• D. $<K$

Answer 1

The correct option is B $=K$

For a reversible reaction at any stage,

$aA+bB\rightleftharpoons cC+dD$

$Q=\frac{\left[C{]}^c\right[D{]}^d}{\left[A{]}^a\right[B{]}^b}$

At equilibrium, $Q=K$

Reaction Quotient = Equilibrium Constant