Test: Catalysis (Old NCERT) - NEET MCQ

Catalyst is required in equal amount as the reactants present in the reaction

Catalytic activity of a solid catalyst does not depend upon the extent of chemisorption

Desorption is not important for a solid to act as good catalyst

Same reactants may give different products by using different catalysts

Finely divided platinum

Colloidal solution of palladium

Small pieces of palladium

A single metal surface of platinum

Acts as a promoter to increase the activity of the catalyst

Acts as a poison to decrease the activity of the catalyst

Provides a new pathway to the reaction

Forms another intermediate compound with lesser activation energy

Homogeneous catalysis

Heterogeneous catalysis

Negative catalysis

Auto catalysis

The heat liberated during adsorption increases the rate of reaction

The kinetic energy of reactants increases which increases the rate of reaction

The activation energy of reaction increases which increases the rate of reaction

The concentration of reactants at the active centres becomes high due to adsorption resulting in increase in the rate of reaction

NO

NO₂

N₂O₄

N₂O₅

Zeolites

Enzymes

Platinum

Ziegler-Natta catalyst

Zeolites are open structures of silica in which trivalent aluminium is substituted by a fraction of silicon atoms

Shape selectivity of zeolites depends upon porous structure of the catalyst

Zeolites are synthetic microporous aluminosilicates which do not exist naturally

Zeolites are aluminosilicates haveing three dimensional network

At low temperature

At atmospheric pressure

At high temperature

In aqueous medium