For the reaction 2NO + Br2 ------> 2NOBr Mechanism given is NO +Br2 <------> NOBr, (fast) NOBr2 + NO ------> 2NOBr (slow) Then which of the following is true? (1) Order of the above reaction is less than molecularity of reaction (2) Order of the above reaction is equal to molecularity of reaction (3) Order is greater than molecularity of reaction (4) Relation between order and molecularity cannot be predicted

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Which of the following statements are applicable to a balanced chemical equation of an elementary reaction?
(a) Order is same as molecularity
(b) Order is less than the molecularity
(c) order is greater than the molecularity
(d) Molecularity can never be zero

For a complex reaction ......... .

(a) order of overall reaction is same as molecularity of the slowest step
(b) order of overall reaction is less than the molecularity of the slowest step
(c) order of overall reaction is greater than molecularity of the slowest step
(d) molecularity of the slowest step is never zero or non-integer

Q. Which of the following statement is/ are correct?
(i) Molecularity of a reaction cannot be fractional.
(ii) Molecularity of a reaction cannot be more than three.
(iii) Molecularity of a reaction cannot be obtained from balanced chemical equation.
(iv) Molecularity of a reaction may not be equal to the order of the reaction.

Q. Assertion (A): The molecularity of the following reaction is 2.

H_{2} + B r_{2} \to 2 H B r

Reason (R): The order of reaction is 3/2.

Q. Assertion :The molecularity of the reaction

H_{2} + B r_{2} \to 2 H B r

is 2. Reason: The order of the reaction is 3/2.

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