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Byju's Answer
Standard XII
Chemistry
Order of Reaction
Which one of ...
Question

Which one of the following statements for order of a reaction is not correct?

A
Order can be determined experimentally.
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B
Order of reaction is equal to sum of the powers of concentration terms in differential rate law.
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C
It is not affected with the stoichiometric coefficient of the reactants.
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D
Order cannot be fractional.
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Solution

The correct option is D Order cannot be fractional.
Order of a reaction can be fractional so Option D is wrong.

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Q.

Which of the following statements is not correct about order of a reaction ?
(a) The order of a reaction can be fractional number
(b) Order of a reaction is experimentally determined quantity
(c) The order of reaction is always equal to the sum of the stoichiometric coefficients of reactants in the balanced chemical equation for a reaction
(d) The order of a reaction is the sum of the powers of molar concentration of the reactants in the rate law expression.

Q. Consider the following statements:
1. The rate of reaction is always proportional to the concentration of reactants.
2. The order of an elementary chemical reaction step can be determined by examining its stoichiometry.
3. The first order reactions follow an exponential time course.
Of these statements:
Q. A reaction is first order with respect to the reactant A and second order with respect to the reactant B in a reaction A+B→product.
i) Write the differential rate equation.
ii) How is the rate of the reaction affected on increasing the concentration of B by two times?
Q. The order of reaction is an experimentally determined quantity. It may be zero, positive, negative, or fractional. The kinetic equation of bnth order reaction is
k×t=1n−1[1(a−x)n−1−1an−1]
Half life of nth order reaction depends on the initial concentration according to the following relation :
Unit of k=[1Cone]n−1×Time−1
The differential rate law for nth order reaction may be given as :
dxdt=k[A]n
where A denotes the reactant.The unit of rate and rate constant are same for:
Q. When initial concentration of a reactant is double in a reaction, its half-life period is not affected. the order of the reaction is:
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