Surface Chemistry (Chapter Test - Medical) - Class 12 MCQ

adsorption lowers the activating energy of the
reaction

in the process of adsorption, the activation
energy of molecules becomes large

adsorption produces heat which increases the speed of the reaction

the concentration of reactant molecules at the active centres of the catalyst becomes high due to adsorption

temperature is increased

temperature is decreased

pressure is increased

concentration is increased

T₁ = T₂ = T₃

T₁ < T₂ <T₃

T₃ < T₂ < T₁

T₁ < T₂ <T₃

adsorption isotherm

adsorption isobar

adsorption isochore

adsorption isostere

It forms monolayer

It occurs at low temperature

It is reversible in nature

It is not specific in nature

All the above are correct for different range of
pressure

High specificity

Irreversibility

Non-specificity

None of the above

The extent of adsorption depends on the nature of its adsorbent and adsorbate

The extent of adsorption depends on the
pressure of the gas

The extent of adsorption depends on the
temperature

The extent of adsorption has no upper limit

Takes the reaction in backward direction

Retard the rate of reaction

Promote the side reaction

None of these

ΔG

ΔS

ΔH

All of the above

TΔS is positive

ΔH - TΔS is negative

ΔH is positive

TΔS and ΔG becomes zero

The efficiency of a solid catalyst depends upon its surface area
 

Catalyst operates by providing alternate path for the reaction that involves lower energy of activation

Catalyst lower the energy of activation of the
forward reaction only

Catalyst does not affect the overall enthalpy change of the reaction

It is preferentially adsorbed on the catalyst

It adsorbs the molecules of the reactant

It combines chemically with the catalyst

It combines with one of the reactants

Reactant catalysis

Product catalysis

Solvent catalysis

Heat produced in the reaction catalysis

It changes the equilibrium point

It initiates the reaction

It alters the rate of reaction

It increases the average kinetic energy of the
molecule

Alters the amount of the products

Decreases the ΔH of forward reaction

Increases the ΔH of forward reaction

Lower the activation energy

D < A < C < B

C < B < D < A

A < C < B < D

B < D < A < C

Heterogeneous catalysis

Enzyme catalysis

Homogeneous catalysis

Acid-base catalysis