CBSE Class 12 Chemistry Chemical Kinetics MCQs Set B

I. MCQ - Choose Appropriate Alternative

Question. The rate of chemical reaction __________ with increase in concentration of the reactants. (Increases, Decreases, Does not alter)

Question. Ionic reactions of inorganic compounds are __________. (very slow, moderately slow, very fast)

Question. The rate of __________ reactions can be determined. (Very Slow, Moderately Slow, Very fast)

Question. The sum of exponents of the concentrations of reactants is called __________. (Order of reaction, Molecularity, Equilibrium Constant)

Question. The rate of reaction generally __________ in the presence of a suitable catalyst.  (Increases, Decreases, remains constant)

Question. The rate of a reaction __________ upon the temperature. (depends, slightly depends, does not depends)

Question. The minimum energy required to bring about a chemical reaction is called __________. (Bond energy, Ionization energy, Energy of Activation)

Question. Oxidation of SO₂ in the presence of V₂O₅ in Sulphuric Acid industry is an example of __________. (Homogenous catalyst, Heterogeneous catalyst, Negative catalyst)

Question. Hydrolyses of ester in the presence of acid is an example of __________. (Homogenous catalyst, Heterogeneous catalyst, Negative catalyst)

Question. Concentration of the reactants __________ with the passage of time during a chemical reaction. (Increases, Decreases, Does not alter)

Question. Concentration of the products __________ with the passage of time during a chemical reaction. (Increases, Decreases, Does not alter)

Question. The rate constant __________ with temperature for a single reaction. (Varies, Slightly Varies, Does not vary)

Question. The rate of reaction at a particular time is called __________. (Average Rate of reaction, Absolute rate of reaction, Instantaneous rate of reaction)

Question. The specific rate constant K has __________ value for all concentrations of the reactant. (Fixed, Variable, negligible value)

Question. By increasing the surface area the rate of reaction can be __________. (Increased, Decreased, Doubled)

Question. MnO₂ when heated with KClO₃ __________. (Gives up its own oxygen, Produces ozone O₃, Acts as catalyst)

Question. Reactions with high energy of activation proceed with __________. (High speed, Moderately slow speed, slow speed)

Question. The minimum amount of energy required to bring about a chemical reaction is called __________. (Energy of ionization, Energy of Activation, Energy of Collision)

Question. An inhibitor is a catalyst which __________ rate of reaction. (Increases, Decreases, Does not alter)

Question. __________ is the change of the concentration of reactant divided by the time. (Rate of reaction, Velocity Constant, Molecularity)

II. Fill in the Blank

Question. The branch of chemistry, which deals with the study of rates and mechanisms of chemical reactions, is known as __________.

Question. Such reactions, which proceeds with very high velocities and are completed very quickly are called __________ reactions.

Question. Such reactions, which take place very slowly, are called __________ reactions.

Question. Reactions between silver nitrate and sodium chloride to form white precipitates of silver chloride are an example of __________ reaction.

Question. Reactions of Organic compounds are slow and are called __________ reactions.

Question. There are some reactions, which proceed slowly with a __________ speed.

Question. The rate of __________ reaction can only be determined.

Question. The amount of chemical change taking place in concentration of the per unit time is called __________ of reaction.

Question. Rate of reaction is expressed in __________.

Question. The rate of reaction between two specific interval of time is called __________.

Question. The addition energy required to bring about a chemical reaction is called __________.

Question. According to __________ theory for a chemical reaction to take place, the reacting molecules must come closed together.

Question. The addition of __________ helps the reaction by lowering the energy of activation.

Question. The rate of reaction __________ with the increase in concentration of the reacting molecules.

Question. When the concentration of both the reacting molecules is double, the probability of collisions between them will be __________ times.

Question. By __________ the surface area of the reactants, the rate of reaction is increased.

Question. Rate of reaction generally __________ with the rise of temperature.

Question. A __________ is a substance, which either accelerates or retards the rate of reaction without taking part in the reaction.

Question. In the preparation of Oxygen from Potassium Chlorate, __________ is used as catalyst.

Question. In the oxidation of SO₂ to SO₃ by the contact process for the manufacture of H₂SO₄ __________ is used as catalyst.

Question. An unstable intermediate compound formed during a chemical reaction is called __________.

Question. When a catalyst and the reactants are in the same phases, it is known as __________ catalyst.

Question. When a catalyst and the reactants are in different phases, it is called __________.

Question. When a catalyst increases the rate of reaction, it is called __________ catalyst.

Question. When a catalyst retards the rate of reaction, it is called __________ catalyst.

Question. A negative catalyst __________ the energy of activation, hence the rate of reaction is decreased.

Question. The ratio between the rate of reaction and concentration of reactants is known as __________.

Question. Velocity constant is independent of concentration but depends on __________.

Question. Ionic reactions are __________ than molecular reactions.

Question. The value of specific rates constant for a reaction __________ with time.