(D) catalyst is a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.By increasing the r

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Decrease the time required for the reaction

(D) catalyst is a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.By increasing the rate of reaction,it effectively decreases the time required for the reaction to reach equilibrium or completion.

Class 12 Chemistry Surface Chemistry Catalyst and Catalysis

Medium

$A$ catalyst is used in a reaction to

A
Change the nature of reaction products
B
Increase the reaction yield
C
Decrease the need for reactants
D
Decrease the time required for the reaction

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Class 12 Questions

Class 12

Chemistry Questions

Chapter

Surface Chemistry

Subtopic

Catalyst and Catalysis

Reactions in $Zeolite$ catalysts depend on,

EasyKCET 2016

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In the reaction $KMnO_4 + H_2SO_4 + H_2C_2O_4$,the $Mn^{2+}$ ions act as:

Easy

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Write the characteristics of a catalyst.

Medium

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Describe some features of catalysis by zeolites.

Difficult

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Match the catalyst with the process:

Catalyst Process

$i. Na_{2}O$ $a. \text{Oxidation of } SO_{2} \text{ in the manufacture of } H_{2}SO_{4}$

$ii. TiCl_{4} + Al(CH_{3})_{3}$ $b. \text{Polymerisation of ethylene}$

$iii. PdCl_{2}$ $c. \text{The oxidation of ethyne to ethanal}$

$iv. \text{Nickel complexes}$ $d. \text{Polymerisation of alkynes}$

Which of the following is the correct option?

Catalyst	Process
$i. Na_{2}O$	$a. \text{Oxidation of } SO_{2} \text{ in the manufacture of } H_{2}SO_{4}$
$ii. TiCl_{4} + Al(CH_{3})_{3}$	$b. \text{Polymerisation of ethylene}$
$iii. PdCl_{2}$	$c. \text{The oxidation of ethyne to ethanal}$
$iv. \text{Nickel complexes}$	$d. \text{Polymerisation of alkynes}$