MolSynapsequestion bank

MolSynapse / Question bank / Chemical Equilibrium / Law of mass action, Kc and Kp

NEET levelSingle correct optionDifficulty 1 of 3ce005

For a reaction at a given temperature, $K_{c} = 50$ and the reaction quotient is $Q_{c} = 20$ . Which statement is correct?

AThe net reaction proceeds in the backward direction until $Q_{c} = K_{c}$ .
BThe net reaction proceeds in the forward direction until $Q_{c} = K_{c}$ .
CThe system is already at equilibrium.
D $K_{c}$ will decrease until it becomes equal to $Q_{c}$ .

Answer: B

When

Q_{c} < K_{c}

the mixture has too much reactant relative to equilibrium, so the net change is forward and

Q_{c}

increases to

K_{c}

.

K_{c}

itself depends only on temperature and does not change.

Practice Chemical Equilibrium More on Law of mass action, Kc and Kp

Previous questionNext question

More questions on Law of mass action, Kc and Kp