Question # 1

Which properties of liquid is measured by polarimeter

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Conductance

Refractive index

Optical activity

Change in volume

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

Which statement is incorrect about activated complex

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Short lived

Maximum energy

Unstable combination of atoms

Less energy than Ea

The unit of rate constant is the same as that of the rate of reaction is.

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First order reaction

Second order reaction

Zero order reaction

Third order reaction

When a chemical reaction is completed.

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Instantaneous rate > average rate

Instantaneous rate = average rate

Instantaneous rate is zero

Both average and instantaneous rates become zero

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

Half -Life for a given reaction is doubled if initial concentration is doubled. The order of reaction is.

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0

1

2

3

The rate of reaction

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Increase as the reaction proceeds

Decreases as the reaction proceeds

Remains the same as the reactions proceeds

May decrease or increase as the reaction proceeds

Which technique is used ot determine the absorption of radiations.

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Spectrometry

dilatometer method

Refractometric method

Optical rotation method

A type of meals are usually used as catalyst.

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Coinage metal

Alkali metals

Transition metals

alkaline earth metals

When a reaction occurs in many steps than the slowest step is.

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Mechanism step

Rate determining step

enthalpy determining step

None of the above

The quantitative relationship between rate and concentration is given by.

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Law of mass action

Rate law

Both of these

Le Chatelier's principle

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

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First order reaction

Second order reaction

Zero order reaction

Third order reaction

The substance which decrease the activity of a catalyst is called.

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Promoter

Activator

Inhibitor

Positive catalyst

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

The reaction that involves gases, its rate does not depend upon

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Catalyst

Temperature

Moles dm^-3

Partial pressure

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

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Slow

Fast

Endothermic

Exothermic

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

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Average rate

Instantaneous rate

Spontaneous rate

Over all rate

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Chemistry Fsc Part 1 Chapter 11 Online Test MCQs With Answers

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