Question # 1

The rate of reaction determined at a given time is called

Choose an answer

Average rate

Instantaneous rate

Specific rate

Overall rate

In the hydrolysis of CH₃COOC₂H₅the acid produced is

Choose an answer

Inhibitor

Catalyst

Auto catalyst

None of above

If initial concentration of the reactants and half life period of the reaction is known, then we can determine

Choose an answer

Average rate of reaction

Order of reaction

Rate constant k

Instantaneous rate

In the manufacture of NH₃by Haber's process catalyst used is iron its catalytic efficiency is poisoned by

Choose an answer

Presence of Al₂O₃

Presence of Cr₂O₃

MnO₂

CO present with H₂gas

Activation energy is the difference of energy between the energy of the reactant and

Choose an answer

The product

The activated complex

Both a and b

None of these

Dilatometer method is useful for the reaction that involve :

Choose an answer

Small volume changes in solutions

Change in infractive indices

Where reactants absorb U.V, visible or infrared radiation

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 an answer

Slope

1/Slope

Slope x R

Slope x 2.303 R

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

Choose an answer

Rate of reaction

Velocity of reaction

Order of reaction

Molecularly

For effective collisions the molecules slow down before collision and their kinetic energy decreases which results in increase in their

Choose an answer

Activation energy

Average energy

Potential energy

Collisions frequency

Choose an answer

1st order

2nd order

Zero order

3rd order

If the rate of decay of radioactive isotope decreases from 200 cpm to 25 cpm after 24 hours, what is its half life :

Choose an answer

8 hours

6 hours

4 hours

3 hours

Choose an answer

Diastase

Lipase

Inverters

Zymase

For a chemical reaction to take place the particles must have sufficient energy for the effective collisions, the energy is called

Choose an answer

Average energy

Activation energy

Potential energy

Collision energy

Which technique is used to determine the absorption of radiations?

Choose an answer

Dilatometer method

Optical rotation method

Spectrometry

Refractometric method

The rate of reaction b/w two specific time intervals is called :

Choose an answer

Instantaneous rate of reaction.

Average rate of reaction.

Rate of a reaction.

Minimum rate of a reaction.

The rate determining step is the :

Choose an answer

Slowest step.

Fastest step.

Moderate step.

Both (a) and (b).

The unit of rate constant K ismole^-1 dm³for a chemical reaction, the order of reaction is :

Choose an answer

Order of reaction can determined by an experiment

Order of reaction can determined from a balance equation only.

Order of reaction can determined increases by increasing temperate.

Order of reaction must be in whole number and not in fraction.

Platinum is poisoned by

Choose an answer

Arsenic

Silver

Argon

Zinc

Which of the following reactions occur at moderate rate :

Choose an answer

Rusting of iron

Chemical weathering of stone work of buildings by acidic gases in atmosphere.

Hydrolysis of an ester

Fermentation of sugars

The rate constant k of a reaction activation energy Ea and temperature are related by Arrhenius in the form of an equation which is

Choose an answer

______ are called biocatalysts

Choose an answer

Organic acids

Organic bases

Enzymes

All

When we perform the same reaction by taking two different initial concentrations of a reactant for a second order reaction then

Choose an answer

Reaction becomes exothermic

Energy of activation is different

Mechanism of reaction is changed

Half life period is changed

To determine the rate of reaction chemically a graphical method is applied. A graph is plotted between the amount or reactant decomposed or product formed against the time. The rate d_x/d_tat any time is equal to

Choose an answer

k

Tangentθ

1/a, a is initial conc.

1/a²

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

Choose an answer

Which statement is not correct

Choose an answer

Enzymes catalyst a specific reaction

Enzymes show catalytic activity at a specific temperature

The catalytic activity of enzymes is stopped if optimum pH is changed

The catalytic activity is poisoned by a co-enzymes

The sum of the exponents of the conc. terms in the rate equation is called

Choose an answer

Rate of reaction

Order of reaction

Specific rate constant

Average rate

All reactions occur in :

Choose an answer

A single step.

A series of steps

Two steps.

Both (a) and (b)

Choose an answer

Measuring pH

Measuring density

Titration against standard NaOH

Titration against standard KMnO₄solution

A pseudo uni-molecular reaction has order of reaction :

Choose an answer

3

2

1

0

It rate law of an equation is written asdx/dt=K[A][B] ?

Choose an answer

Reaction is independent of the concentration of A and B.

Product is decreasing with passage of time.

Reactant in increasing with passage of time.

Reactant is increasing with passage of time.

A zero order reaction is one in which :

Choose an answer

Rate is not affected by changing concentration of reactants.

concentration of reactants do not change with the passage of time.

Reactants do not react.

One reactants in large excess.

More Classes

Other Links

ECAT Chemistry Chapter 11 Reaction Kinetics Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer