Question # 1

In endothermic reactions, the heat contents of the surrounding air

Choose an answer

Remains constant

Decreases

Increases

Fluctuates rapidly

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

Choose an answer

Internal source.

Any source.

External source.

All of above.

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

Choose an answer

Unidirectional.

Real.

Irreversible.

Artificial.

Burning of coal and hydrocarbon in air are examples of

Choose an answer

Non-spontaneous reaction

Spontaneous reaction

Natural reaction

Both b and c

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

Choose an answer

Imaginary line

Boundary

Real line

All of above

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

Choose an answer

Joule

Calorie

Kilo Joule

Both a and c

A reaction will also be called a spontaneous if :

Choose an answer

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.

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:

Choose an answer

Spontaneous process.

Natural process.

Non-Spontaneous process.

Both (a) and (b).

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

Choose an answer

Remains constant.

Decreases.

Increases.

Fluctuates rapidly.

Neutralization of a strong acid with a strong base is

Choose an answer

Natural acid base reaction

Artificial acid base reaction

Spontaneous acid base reaction

both a and c

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

Choose an answer

Internal source

Any source

External source

All of above

Which one of the following is not related to spontaneous process

Choose an answer

Unidirectional

Real

Irreversible

Artificial

For the reaction : NaOH + HCl---------------> NaCl + H₂O the change in enthalpy is called:

Choose an answer

Heat of reaction.

Heat of formation.

Heat of neutralization.

Heat of combustion.

The majority of reactions which give stable products are

Choose an answer

Exothermic

Isothermal

Endothermic

Both a and c

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

Choose an answer

Endothermic.

Heat of products.

Exothermic reaction.

Heat of reaction.

Calorie is equivalent to

Choose an answer

0.4184 J

41.84 J

4.184 J

418.4 J

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

Choose an answer

Surrounding

System and surrounding

System

State function

A reaction will also be called a spontaneous if

Choose an answer

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

The subject matter of first law of thermochemistry is based on

Choose an answer

First law of Thermochemistry

First law of Thermodynamics

Second law of Thermochemistry

Second law of Thermodynamics

The net heat change 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:

Choose an answer

Henry's law.

Joule's principle.

Hess's law.

Law of conservation of energy.

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

Choose an answer

Joule.

Calorie.

Kilo Joule.

Both (a) and (c)

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

Choose an answer

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

Choose an answer

Thermochemistry

Biochemistry

Physical chemistry

Analytical chemistry

By state, we mean the

Choose an answer

Reaction of system

Scope of a system

Condition of a system

None of above

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

Choose an answer

Physical change

Chemical change

Biological change

All of above

Burning of coal and hydrocarbon in air are examples of :

Choose an answer

Non-spontaneous reaction.

Spontaneous reaction.

Natural reaction

Both (a) and (C)

More Classes

Other Links

ECAT Chemistry Chapter 7 Thermo Chemistry Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer