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.

First order reaction C. Thermal decomposition of HI on gold surface

Match the terms of Column I with Column II and choose the correct option from the codes given below. Column I Column II A. Inversion of cane sugar 1. Zero order reaction B. Decomposition of N2O5

Assertion (A) The reaction mentioned in Above ques. behaves as pseudo first order reaction. Reason (R) Change in the concentration of H2O is negligible.

Consider the following equation, H CH COOC H H O CH COOH C H OH -> t = 0 0.01 mol 10 mol 0 mol 0 mol t 0 mol 9.9 mol 0.01 mol 0.01 mol I.The concentration of water does not get altered much during the course of the…

What is true about pseudo first order reaction?

The value of rate constant of a pseudo first order reaction does not