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Classes
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Aptitude Tests

Browse Worksheets
Classes
- Grade 9
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- Grade 11
- Grade 12
Aptitude Tests

Browse Worksheets
Classes
- Grade 9
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- Grade 11
- Grade 12
Aptitude Tests

ECAT MDCAT : Chemistry chapter 7 REACTION KINETICS

Leave a Comment / By Afshan JAMAL / August 15, 2026

Welcome to your ECAT MDCAT : Chemistry chapter 7 REACTION KINETICS

The rate of reaction between two specific time intervals is called

Choose the correct option.

Instantaneous rate

Average rate

Specific rate

Ordinary rate

None

By the use of catalysis the energy of activation is

Choose the correct option.

Decreased

Increased

Not affected

None

which one of the following is a heteroheneous catalysis

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Inhibitor

Catalyst

Auto catalyst

None of above

None

are called biocatalysts

Choose the correct option.

Organic acids

Organic bases

Enzymes

All

None

The actual number of atoms or molecules taking part in rate determining step is

Choose the correct option.

Rate of reaction

Velocity of reaction

Order of reaction

Molecularly

None

Refrectrometric method is used when

Choose the correct option.

Reactions involving absorption of I.R. or U. V

Reactions involving change of refractive index

Reactions involving ions

Change of optical activity

None

The value of activation energy Ea of a reaction can be determined from the value of slope of the straight line obtained by plotting a graph between 1/T and log k. the value of Ea is equal to

Choose the correct option.

2

3

4

9

None

In the hydrolysis of CH3COOC2H5the acid produced is

Choose the correct option.

Slope

1/Slope

Slope x R

Slope x 2.303 R

None

The change in concentration of reactant or product per unit time is called:

Choose the correct option.

Rate constant.

Rale of reaction.

Rate equation.

Rate law.

None

When initial concentration of reactants an order of reaction is given, then its half life period can be calculated by the equation

Choose the correct option.

None

Question Image

Choose the correct option.

A Silver nitrate solution to sodium chloride solution.

B. Silver chloride solution to sodium nitrate solution.

C. Silver nitrate solution to potassium chloride solution

D. Silver nitrate solution to hydrogen chloride solution.

None

The rate of reaction determined at a given time is called

Choose the correct option.

Average rate

Instantaneous rate

Specific rate

Overall rate

None

Question Image

Choose the correct option.

Rate is independent of concentration of water since it is in excess

Rate is independent of concentration of ester since it is in exces

Rate depends upon the concentration of acid catalyst added

Rate = k[CH₃COOC₂H₅]¹/²[H₂O]¹/²

None

If half life period of a reaction is independent of the concentration of the reactants, then the reaction is

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Zero order

First order

Second order

Order is in fraction

None

Which of the following may affect the rate constant (k) fro a reaction:

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Change in concentration.

Change in pressure.

Change in pH.

Change in temperature.

None

Question Image

Choose the correct option.

Homogeneous

Heterogeneous

Isogeneous

None

A white precipitate ofsilver chlorideimmediately formed on additionof

Choose the correct option.

None

Question Image

Choose the correct option.

None

Question Image

Choose the correct option.

Small change in concentration of product

Small time internal

Co-efficient of the reactant

Co-efficient of the product

None

Decreases om concentration of reactant is denoted by

Choose the correct option.

dcdt/

-dcdt/

+dc/dt

None

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