Question # 1

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 energy units in which heat changes usually expressed in Sl-system are:

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Joule.

Calorie.

Kilo Joule.

Both (a) and (c)

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

In a chemical change, the energy in the form of heat will either be evolved or absorbed and this is called

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Endothermic

Heat of products

Exothermic reaction

Heat of reaction

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 (a) and (C)

When a piece of zinc is added to the copper sulfate solution,____________ color of solution disappear.

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Pink.

Purple.

Blue.

Brown.

Which one of the following is not related to spontaneous process

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Unidirectional

Real

Irreversible

Artificial

In a chemical change, the energy in the from of heat will either be evolved or absorbed and this is called:

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Endothermic.

Heat of products.

Exothermic reaction.

Heat of reaction.

Calorie is equivalent to

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0.4184 J

41.84 J

4.184 J

418.4 J

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

Reaction between Zn and CuSO₄can be called a system under

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Surrounding

Observation

system

None of above

Calorie is equivalent to :

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0.4184 J

4184 J

4.184 J

418.4 J

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.

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.

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 Themochemistry.

First law of Thermodynamics.

Second law of Themochemistry.

Second law of Thermodynamics.

Neutralization of a strong acid with a strong base is

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Natural acid base reaction

Artificial acid base reaction

Spontaneous acid base reaction

both a and c

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).

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

Enthalpy of neutralization of all the strong acids and strong bases has the same value because:

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Neutralization leads to the formation of salt and water.

Strong acids and bases are ionic substances.

Acids always give rise to H⁺ions and bases always furnish OH^-ions.

The net chemical change involve the combination of H⁺ and OH^-ions to form water.

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

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Thermochemistry.

Biochemistry.

Physical chemistry.

Analytical chemistry.

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

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)

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

The majority of reactions which give stable products are

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Exothermic

Isothermal

Endothermic

Both a and c

The real or imaginary surface separating the system from the surrounding is called

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Imaginary line

Boundary

Real line

All 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

The net heat in a chemical reaction is same, whether it is brought about in two or more different ways in one or several steps. It is known as

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Henry's law

Joule's princile

Hess's law

law of conservation of energy

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

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Unidirectional.

Real.

Irreversible.

Artificial.

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