Chemistry Question Bank

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

For a reaction pA + qB ⟶ products, the rate law expression is r = k [A]m [B]n then

Which of the following statement is/are correct? (a) A catalyst is used in the rate determining step of a mechanism, but then is formed again in some subsequent step so that there is no change in the concentration of …

Mark the correct statement.

Rate of a reaction depends upon

Under a given set of experimental conditions, with increase of concentration of the reactants, the rate of a chemical reaction

Contact process is used in the formation of sulphur trioxide, 2SO g O g 2SO g The rate of reaction can be expressed as O 2.5 10 molL s . t x Then rate of disappearance of [SO2] will be

For the reaction, 4P Q 2R 2S, -> Which of the following statement(s) is/are true? I. Rate of appearance of S is double the rate of the disappearance of Q II. Rate of disappearance of Q is one fourth the rate of disa…

The decomposition of N2O5 in CCl4 at 318 K has been studied by monitoring the concentration of N2O5 in the solution. Initially the concentration of N2O5 is 1.16 mol L-1 and after 92 min, it is reduced to 1.04 mol L-1.…

In the reaction given below 2HI g H g I g -> hoose the correct alternative.

Consider the following statements regarding the equation given below, Hg l Cl g HgCl s -> I.Stoichiometric coefficients of the reactants and products are same in the above reaction. II.Rate of reaction Hg Cl…

For the reaction R P, -> the concentration of a reactant changes from 0.03 M to 0.02 M in 25 min. Calculate the average rate of reaction using units of time in seconds.

In a reaction, 2A ->products, the concentration of A decreases from 1.0 mol L-1 to 0.8 mol L-1 in 20 min. Calculate the rate during this interval.

Assertion (A) Δ[R] is multiplied with -1 to make the rate of the reaction a positive quantity. Reason (R) Δ[R] is a negative quantity in the expression rate of disappearance of R R t