Question # 1

Rusting of iron is the example of

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Fast

Slow

moderate

depends upon conditions

The concentration of product is increasing from 30 mole/dm3 to 40mol/dm3 in 0.5 sec then rate of reaction will be------moledm-3sec-1

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0

20

15

25

Doubling the pressure in a liquid phase reaction

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Will double the rex

Will increase the rex

Will decrease the rex

Will not alter the concentration of reactant

Which property of liquid is measured by polarimeter

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Conductance

Optical activity

Refractiye Indéx

Change in volume

By increasing the concentration of reactants, the rate of reaction

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Decreases

Increases

Remains constant

Not predicted

The number of atoms or molecules whose concentrations determines the rate of a chemical reaction is called the

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Molecularity of the reaction

specific activity of the reaction

Order of the reaction

rate constant of the reaction

Higher the surface area available for reaction

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slower the reaction

faster the reaction

constant the reaction

lower the Ea

The rate of reaction between A and B increases by a factor of 100, when the concentration of A is increased 10 folds, the order of reaction with respect to A is

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10

1

4

2

The collision which results in chemical reaction

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Effective collision

Ineffective collision

Useless collision

All of the above

Spectrometry method is applicable if a reactant or a product absorbs radiation

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Ultraviolet

Visible

Infrared

Any of these

The reaction takes place among the molecules when they have:

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Activation energy

Properly oriented

Concentrated

Activation energy and proper orientation

Which of the following reactions are usually slow?

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Neutralization of acids and bases

Displacement Reactions

Organic substitution reaction

Free radical reactions

The rate of reaction for a reaction is 30 mol dm-3sec-1 if the product of concentration of 10.reactant is unity the specific rate constant is

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25

2.5

30

15

Consider gas is measure in bars then the units of rate of reaction is

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Mole dm-3 sec

Bars sec

Mole dm-3 sec-1

Bars sec-1

The radioactive disintegration of 238U92 is

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First order

Second order

Third order

Zero order

If the rate of the reaction is equal to the rate constant, the order of the reaction is

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3

1

0

2

The conversion of molecules of A to B follows a second order kineties. Doubling the concentration of A will inerease the rate of formation of B by a factor of

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2

4

1/2

1/4

The order of reaction provides valuable information about of reaction

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Condition

Concentration

Mechanism

Parameters

When the concentration of product is increased the instantaneous rate of reaction with reference to reactants will be

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Positive

Negative

the same

falling curve

In which of the following techniques rate of reaction is directly related with number ofions

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Spectrometry

Dilatometric method

Conductometric method

Refractometric method

When the concentration of reactants is taken as unity the rate of reaction is equal to

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average rate

concentratian of reactant

instantaneous rate

specific rate constant

For reaction of methane and chlorine light is not available then

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Reaction will take place rapidly

No Reaction take place

Reaction occurs at double the rate

May all cases occur

In dilatometric method is directly proportional to extent of reaction

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Change in concentration

Change in pressure

Chang in volume

Change in temperature

For a chemical reaction in which one of the reactant also act as solvent, the order will be

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First order

Third order

Second order

pseudo-first order

The reaction which is zero order

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Decomposition ofN2O5

Formation of Glucose in plant

Formation of Fel2

Chorination of methane in sunlight

For a chemical reaction which can never be a fractional no

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order

molecularity

half-life

rate constant

For a chemical reaction to occur

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The vessel shall be open

Reacting molecules should have less energy than Ea at time of collision

Reacting molecules must be properly oriented and energy more than or equal to Ea

The reacting molecules must not collide with each other

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