Question # 1

Glucose can be converted into ethanol by an enzyme.

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Lipase

Zymase

Sucrose

Urease

When a reaction proceeds in a sequence of steps, the overall rate is determined by

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Fastest step

Slowest step

Order of different steps

Molecularity of all steps

Which statement is incorrect about order of reaction

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It cannot be determined experimentally

It is determined experimentally

Sum of exponents in rate equation

It can have fraction value

Dilatometer method is useful for the reactions that involve.

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Ionic species

Where reactant absorb U.V. visible or infrared radiations

Small volume changes in solutions

Change in refractive indices

The unit of rate constant is same as that of rate of reaction in

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first order reaction

Second order reaction

Third order reaction

Zero order reaction

The rate of reaction determined at any given time is called.

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Average rate

Instantaneous rate

Spontaneous rate

Over all rate

When a chemical reaction is completed the

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Instantaneous rate > average rate

Instantaneous rate = average rate

Instantaneous rate is zero

Both average and instantaneous rates become zero

In zero order reaction the rate is independent of.

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Temperature of reaction

Concentration of reactants

Concentration of products

None of these

A substance which itself is not a catalyst but increases the activity of a catalyst is called.

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Promoter

Poisoner

Inhibitor

Enzyme

If reactants have very low activation energy it means that reaction is.

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Slow

Fast

Endothermic

Exothermic

The unit of rate constant depends upon

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Number of reactants

Concentration terms

Order of reaction

Molecularity of reaction

Half life period for 235 U is

92

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710 million years

810 milion years

720 million years

820 million years

Unit of rate constant is the same as that of the rate of reaction in

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Zero order reaction

1st order reaction

2nd order reaction

3rd order reaction

The influence of temperature on reaction rate is predicated by

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Free energy change of reaction

Arrhenius equation

Van der weal's equation

Kinetic equation

Velocity constant is the rate of reaction when the concentrations of reactants are

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Zero

Unity

Two

Three

A substance which rerareds the rate of a reaction is called

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Inhibitor

Activator

Auto-catalyst

None of these

Rate of a chemical reaction generally increase rapidly even for small increase in temperature because of rapid increase in the

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Collisions frequency

Activation energy

Average KE of molecules

Fraction of molecules with energies more than activation energy

a zero order reaction is one is which

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Reactants do not react

One reactant is in large excess

Concentration of reactant do not change with passage of time

Rate is of affected by changing concentration of reactants

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Chemistry Fsc Part 1 Chapter 11 Online Test MCQs With Answers

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