Chemistry Question Bank

…A… dependence of rate is called differential rate equation. Choose the suitable word to replace A.

Assertion (A) Molecularity of a reaction can have a fractional value. Reason (R) Order of a reaction can have a fractional value.

Assertion (A) The reaction, H Br 2HBr -> has a molecularity of two. Reason (R) Order of reaction is 3/2.

For the reaction 2A + B ⟶ D + E the following mechanism has been proposed : A + B ⟶ C + D (slow) A + C ⟶ E (fast) The rate law expression for the reaction is

…A… reactions involves a sequence of elementary reactions in the formation of product. Here, A refers to

Pseudo order reaction A B C (a) (b) (c) (d)

The reactions taking place in one step are called …A… reactions. Here, A is

molL mol Ls s molL x A B C

molL s s molL x C. Second order reaction

molL molL s s molL x B. First order reaction

Match the following Columns and choose the correct option from the codes given below. Column I (Reaction) Column II (Units of rate constant) A. Zero order reaction

The rate of formation of a dimer in a second order dimerisation reaction is 9.1 × 10–6 mol L–1 s–1 at 0.01 mol L–1 monomer concentration. What will be the rate constant for the reaction?

For which of the following, the units of rate constant and rate of the reaction are same?

The unit of the rate constant of nth order is

The equilibrium constant of reaction is 20.0 At equilibrium, the rate constant of forward reaction is 10.0. The rate constant for backward reaction is

The unit of rate constant for a zero-order reaction is

The rate law for a reaction between the substances P and Q is given by rate a b k P Q On doubling the concentration of P and reducing the concentration of Q to one-half, the ratio of the new rate to the earlier rate…

Statement I The rate law may not depend on the concentration of every reactants. Statements II With increase in temperature, the rate of reaction increases. Choose the correct option regarding above statements.

The conversion of molecules x to y follows second order kinetics. If concentration of x is increased to three times how will it affect the rate of formation of y ?

Which of the following statement(s) is/are true? I.Rate law is an experimental fact while law of mass action is a theoretical proposal. II.Rate law is more informative than law of mass action for the development mecha…

For the reaction A + B ⟶ C + D, doubling the concentration of both the reactants increases the reaction rate by 8 times and doubling the initial concentration of only B simply doubles the reaction rate. The rate law f…

In the reaction 2 A + B ⟶ Products, the order w.r.t. A is found to be one and w.r.t. B equal to 2. Concentration of A is doubled and that of B is halved, the rate of reaction will be

For the gaseous reaction 2A + B ⟶ C + D, the rate is given by k [A] [B]. The volume of the container containing the reaction mixture is suddenly reduced to one fourth of its original volume. with respect to the origin…

Which of the following statement is not true?

A reaction is of first order when