Chemistry MCQ Set 1

Question : On heating a liquid at its dynamic equilibrium the concentration of molecules in vapour state as well as in liquid state

1. Increase
2. Decreases
3. Remains constant
4. Neither increase nor decreases

Question : For the reaction N₁O₄ → 2 NO₂ before the equilibrium is reached, the ratio in change of concentration of NO₂ to the concentration of N₂O₄ is

1. Equal
2. Half
3. Twice
4. Four time

Question : Chose the correct statement for the Law of Mass Action.

1. The rate of forward reaction is equal to the rate of backward reaction.
2. The rate at which a substance reacts is directly proportional to the substances.
3. The rate at which a substance reacts is directly proportional to its initial concentrations.
4. The rate at which a substance reacts is directly proportional to its final concentrations.

Question : Choose the correct statement for a solution of H3PO4 (49gm/500ml).

1. 1.5N is more concentrated than 1.5M solution.
2. 1.5N is less concentrated than 1.5M solution.
3. 1.5N is more concentrated than 1.5M former contains large amount of solution.
4. 1.5N and 1.5M solution having same.

Question : The molarity of H2SO4 is 0.5M. Its normality will be

1. 0.5N
2. 1.0N
3. 0.25N
4. 2.5M

Question : A 500ml solution contains 49gm of H2SO4. Its molarity is

1. 1.0M
2. 2.0M
3. 1.5M
4. 2.5M