Chemistry Question Bank

The number of reacting species (atoms, ions or molecules) taking part in an elementary reaction, which must collide simultaneously in order to bring about a chemical reaction is called …A… of a reaction Here, A refer to

When the rate of reaction is independent of the concentration of reactants, then the order of that chemical reaction is

I. Order of a reaction can be 0, 1, 2, 3…. II. Order of a reaction can never be a fraction. Which of the above statement(s) is/are true? Choose the correct option.

Order of a chemical reaction is defined as the

The rate of reaction A + B + C ⟶ Products is given by Rate = k [A]1/2 [B]1/3 [C] The order of the reaction is :

Order of a reaction can be

The reactions of higher order are rare because

The rate constant of a reaction is 2.5 × 10–2 minutes–1. The order of the reaction is

The rate of a reaction 2X + Y ⟶ Products is given by d[Y] dt = k [X]2 [Y] if X is present in large excess, the order of the reaction is :

For the reaction CH3COCH3 + I2 H ->Products, the rate is governed by the expression dx k dt [Acetone] [H+] The order w.r.t. iodine is

The rate law expression for the hypothetical reaction 2 A + 3 B ⟶ 2 C is = k [A] [B]2 The order of reaction is

For a single step reaction; A + 2 B ⟶ Products, the molecularity is

Which one of the following statements is incorrect about the molecularity of a reaction?

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

The following mechanism has been proposed for a reaction. 2P Q R S P Q T R Slow P T R fast -> -> -> The rate law expression for the reaction is (a) r k P Q (b) r k P (c) r k P T (d) r k P Q

For a reaction, 2NO 2H N 2H O, -> the possible mechanism is 2NO N O slow N O H N O H O -> fast N O H N H O -> What is the rate law and order of the reaction? (a) Rate = [N2O2], order =

The chemical reaction, proceeds as O O [O] (fast) [O] O 2O -> (slow) The rate law expression will be

In the sequence of reaction k k k A B C D -> -> -> k3 > k2 > k1, then the rate determining step of the reaction is :

The overall rate of the reaction is controlled by the ______ step in a reaction. Choose the suitable word to fill the blank.

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

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