Q.

Which of the following does not affect the rate of reaction ?
 

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a

Amount of the reactants taken
 

b

Physical state of the reactants
 

c

ΔH of reaction
 

d

Size of the vessel

answer is C.

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Detailed Solution

The enthalpy change of reaction does not affect the rate of reaction because the rate of reaction depends only on the

(1) concentrations of reactants, 

(2)Surface Area  of solids

(3) Physical State.

(4)temperature

(5)the presence of a catalyst
 

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Which of the following does not affect the rate of reaction ?