Chemistry Question Bank

…A… of the reaction is the time in which the concentration of a reactant is reduced to one half of its initial concentration. Choose the appropriate word to fill ‘A’ from the options given below.

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.

The reaction, 2N O 4NO O is

Four reactions are given below. Which one of them is of zero order? (a) PCl PCl Cl -> (b) 2FeCl SnCl 2FeCl SnCl -> (c) H Cl 2HCl -> (d) N O 2NO O -> Ans. (c) Sol. The order of all photochemical reactions is zero …

Choose the correct answer out of the following choices. Assertion (A) Order and molecularity are different. Reason (R) Order can be determined experimentally and molecularity is the sum of the stoichiometric coefficie…

Choose the correct answer out of the following choices. Assertion (A) Some zero order reactions may have order in fractions. Reason (R) Order cannot be determined from balanced chemical equation.

Which of the following statement(s) is/are correct about order of a reaction? I.The order of a reaction can be a fractional number. II.Order of a reaction is experimentally determined quantity. III.The order of a reac…

Consider the data given below for a hypothetical reactions M N -> Times(s) Rate of reaction (mol L-1 s-1) 4.20 × 10-4 4.20 × 10-4 4.20 × 10-4 4.20 × 10-4 4.18 × 10-4 For the above data, the order of reaction is

Statement I For a complex reaction, order is given by the slowest step of the reaction. Statement II Molecularity of the slowest step is same as the order of the overall reaction. Which of these statement(s) is/are tr…

2NO O 2NO ->

2HI H I -> C. Trimolecula r

NH NO N 2H O -> B. Bimolecular

NH NO N 2H O -> A B C (a) (b) (c) (d)

2NO O 2NO -> C. Trimolecular

2HI H I -> B. Bimolecular

What is true about pseudo first order reaction?

Match the following Columns and choose the correct option from the codes given below. Column I (Type of reaction) Column II (Example) A. Unimolecular

For a reaction, A B -> product, the rate law is given by, 1/2 r k A B . what is the order of the reaction?

For the rate expression rate 3/2 k A B the overall order of a reaction is

In the presence of acid, the initial concentration of cane-sugar was reduced from 0.2 M to 0.1 M in 5 hrs and to 0.05 M in 10 hrs. The reaction must be of

Which of the following statements is false?

For a simple reaction, 2P Q R S, -> molecularity will be

In the graph shown below ‘I’ means

Energy of activation of an exothermic reaction is