Chemistry Question Bank

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

Rate of a reaction can be expressed as I. The rate of decrease in concentration of any one of the reactants. II. The rate of increase in concentration of any one of the products. Which of the above mentioned statement…

The rate of formation of ammonia by the reaction : N2 + 3 H2 ⟶ 2 NH3 is expressed as d[NH ] dt = 2.5 × 10–4 mol L–1 s–1 . The rate of consumption of H2 expressed as d[H ] dt will be

For the reaction 4NH 5O 4NO 6H O, -> if the rate of disappearance of NH3 is 3.6 × 10–3 mol L-1 s–1, what is the rate of formation of H2O?

Similarly, the stoichiometric coefficient of D, A and B is 3,4 and 1 respectively. Thus using the concept, B D A C -> So, answer b is correct.

The rate of a reaction is expressed in different ways as follows : 1 d[C] 1 d[D] 1 d[A] d[B]. 2 dt 3 dt 4 dt dt The reaction is

In a reaction 2HI ⟶ H2 + I2, the concentration of HI decreases from 0.5 mol L–1 to 0.4 mol L–1 in 10 minutes. What is the overall rate of reaction during this interval?

Consider the reaction, 2N O 4NO O . -> In the reaction NO2 is being formed at the rate of 0.0125 mol L–1 s–1. What is the rate of reaction at this time?

Chemical kinetics plays an important role in

For a reaction X + Y ⟶ Z, rate[X]. What is (i) molecularity and (ii) order of reaction?

The rate of formation of NO2 during the period 600 – 700 s is

The instantaneous rate of reaction at the beginning of the reaction is

Assertion (A): If the activation energy of a reaction is zero, temperature will have no effect on the rate constant. Reason (R): Lower the activation energy, faster is the reaction.