(B) catalyst is a substance that increases the rate of a reaction without itself being consumed at the end of the reaction. It is important to note th

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$A$ catalyst can initiate a reaction.

(B) catalyst is a substance that increases the rate of a reaction without itself being consumed at the end of the reaction. It is important to note that a catalyst cannot initiate a reaction that is not thermodynamically feasible. It only lowers the activation energy,thereby increasing the rate of reaction. Therefore,the statement that a catalyst can initiate a reaction is false.

Class 12 Chemistry Surface Chemistry Catalyst and Catalysis

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Which of the following statements regarding catalyst is not true?

A
$A$ catalyst remains unchanged in composition and quantity at the end of the reaction.
B
$A$ catalyst can initiate a reaction.
C
$A$ catalyst does not alter the equilibrium in a reversible reaction.
D
Catalysts are sometimes very specific in respect of reaction.

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Class 12 Questions

Class 12

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Surface Chemistry

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Catalyst and Catalysis

Reactions in $Zeolite$ catalysts depend on

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$A$ catalyst is a substance which

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Match the following:
List-$I$ (Reaction) List-$II$ (Catalyst)
$A$. Hydrogenation of vegetable oils $I$. $Ni$
$B$. Decomposition of potassium chlorate $II$. $MnO_2$
$C$. Oxidation of $SO_2$ in lead chamber process $III$. $Pt$
$D$. Oxidation of ammonia in Ostwald's process $IV$. $NO_{(g)}$
The correct answer is

List-$I$ (Reaction)	List-$II$ (Catalyst)
$A$. Hydrogenation of vegetable oils	$I$. $Ni$
$B$. Decomposition of potassium chlorate	$II$. $MnO_2$
$C$. Oxidation of $SO_2$ in lead chamber process	$III$. $Pt$
$D$. Oxidation of ammonia in Ostwald's process	$IV$. $NO_{(g)}$

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