Thermochemistry - Set 1 | NUST Entrance Test

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

Difficulty: Easy

A:

Thermochemistry

B:

Biochemistry

C:

Physical chemistry

D:

Analytical chemistry

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

Difficulty: Easy

A:

Remains constant

B:

Decreases

C:

Increases

D:

Fluctuates rapidly

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In endothermic reactions, the heat contents of the:

Difficulty: Easy

A:

Products equal to the reactants

B:

Reactants more than that of products

C:

Products more than that of reactants

D:

Both (b) and (c)

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The majority of reactions which give stable products are:

Difficulty: Easy

A:

Exothermic

B:

Isothermal

C:

Endothermic

D:

Both (a) and (c)

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

Difficulty: Easy

A:

Physical change

B:

Chemical change

C:

Biological change

D:

All of above

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

Difficulty: Easy

A:

Endothermic reaction

B:

Heat of products

C:

Exothermic reaction

D:

Heat of reaction

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

Difficulty: Easy

A:

Joule

B:

Calorie

C:

Kilo Joule

D:

Both (a) and (c)

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The subject matter of first law of thermochemistry is based on:

Difficulty: Easy

A:

First law of Thermochemistry

B:

First law of Thermodynamics

C:

Second law of Thermochemistry

D:

Second law of thermodynamics

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

Difficulty: Easy

A:

Spontaneous process

B:

Natural process

C:

Non-spontaneous process

D:

Both (a) and (b)

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Which one of the following is not related to spontaneous process

Difficulty: Easy

A:

Unidirectional

B:

Real

C:

Irreversible

D:

Artificial

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Choose the correct options for the following questions.

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

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

In endothermic reactions, the heat contents of the:

The majority of reactions which give stable products are:

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

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

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

The subject matter of first law of thermochemistry is based on:

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

Which one of the following is not related to spontaneous process

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