Question # 1

By state, we mean the

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Reaction of system

Scope of a system

Condition of a system

None of above

The energy units in which heat changes usually expressed in SI-system are

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Joule

Calorie

Kilo Joule

Both a and c

Work is a

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State function

Only function

Non-state function

State

Burning of coal and hydrocarbon in air are examples of :

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Non-spontaneous reaction.

Spontaneous reaction.

Natural reaction

Both (a) and (C)

If an endothermic reaction is allowed to take place very rapidly in air, the temperature of the surrounding air

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Remains constant

Decreases

Increases

Fluctuates rapidly

A reaction will also be called a spontaneous if :

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It does no need energy to start with.

It needs energy to carry the whole process.

It needs energy at the end of reaction.

It needs energy to stat with.

The reaction of Zinc with copper sulphate solution is an example of

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Oxidation reduction reaction

Spontaneous reaction

Spontaneous redox reaction

Non-spontaneous reaction

Which one of the following is not related to spontaneous process.

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Unidirectional.

Real.

Irreversible.

Artificial.

Calorie is equivalent to

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0.4184 J

41.84 J

4.184 J

418.4 J

The majority of reactions which give stable products are

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Exothermic

Isothermal

Endothermic

Both a and c

Some non-spontaneous processes can be made to take place by supplying energy to the system from

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Internal source

Any source

External source

All of above

Neutralization of a strong acid with a strong abase is:

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Natural acid base reaction.

Artificial acid base reaction.

Spontaneous acid base reaction.

Both (a) and (c).

When no work is done by the system

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The volume of system decreases

The volume of system increases

The volume of system does not change

None of above

The study of heat changes accompanying a chemical reaction is known as :

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Thermochemistry.

Biochemistry.

Physical chemistry.

Analytical chemistry.

Which one of the following is not related to spontaneous process

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Unidirectional

Real

Irreversible

Artificial

Some Non-spontaneous process can be made to take place by supplying energy to the system from :

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Internal source.

Any source.

External source.

All of above.

It is noticed that energy in the form of heat is either evolved or absorbed as a result of a

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Physical change

Chemical change

Biological change

All of above

In endothermic reactions, the heat contents of the:

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Products equal to the reactants.

Reactants more than that of products.

Products more than that of reactants

Both (b) and (c)

Reaction between Zn and CuSO₄can be called a system under

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Surrounding

Observation

system

None of above

A state function is a

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Microscopic property

Macroscopic

Unique property

Both a and c

A reaction will also be called a spontaneous if

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It does not need energy to start with

It needs energy to carry the whole process

It needs energy at the end of reaction

It needs energy to start with

By comparing both initial and final states of the system, we can describe the change taking place in the

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Surrounding

Both a and c

System

None of above

Burning of coal and hydrocarbon in air are examples of

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Non-spontaneous reaction

Spontaneous reaction

Natural reaction

Both b and c

Which of the following statements is contrary to the first law of themodynamics

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Energy can neither be created nor destroyed

One form of energy can be transferred into an equivalent amount of other kinds of energy

In an adiabatic process, the work done is independent of its path

Continuous production of mechanical work without supplying and equivalent amount of heat is possible

The reaction of zinc with the copper sulfate solution is an example of.

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Oxidation reduction reaction.

Spontaneous reaction.

Spontaneous redox reaction.

Non-spontaneous reaction.

One mole of oxygen confined in a cylinder fitted with a piston is an example of

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Surrounding

System and surrounding

System

State function

A process which takes place on its own without any outside assistance and moves from a non-equilibrium stat towards an equilibrium stat is termed as:

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Spontaneous process.

Natural process.

Non-Spontaneous process.

Both (a) and (b).

The subject matter of first law of thermochemistry is based on

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First law of Thermochemistry

First law of Thermodynamics

Second law of Thermochemistry

Second law of Thermodynamics

Which of the following statements is contrary to the first law of thermodynamics?

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Energy can neither be created no destroyed.

One form of energy can be transferred into an equivalent amount of the kinds of energy.

In a adiabatic process, the work done is independent of its path.

Continuous production of mechanical work without supplying an equivalent amount of heat is possible.

The change in heat energy of a chemical reaction at constant temperature and pressure is called

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entahlpy change

heat of sublimation

bond energy

internal energy change

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