ECAT Pre Engineering Chemistry Chapter 7 MCQ Test With Answer

Question # 1

In endothermic reactions, the heat contents of the:

Products equal to the reactants. A
Reactants more than that of products. B
Products more than that of reactants C
Both (b) and (c) D

Question # 2

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:

Spontaneous process. A
Natural process. B
Non-Spontaneous process. C
Both (a) and (b). D

Question # 3

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

Internal source. A
Any source. B
External source. C
All of above. D

Question # 4

Neutralization of a strong acid with a strong abase is:

Natural acid base reaction. A
Artificial acid base reaction. B
Spontaneous acid base reaction. C
Both (a) and (c). D

Question # 5

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

Endothermic A
Heat of products B
Exothermic reaction C
Heat of reaction D

Question # 6

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

Henry's law A
Joule's princile B
Hess's law C
law of conservation of energy D

Question # 7

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

Enthalpy change. A
Seat of sublimation. B
Bind energy. C
Internal energy change. D

Question # 8

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

Oxidation reduction reaction. A
Spontaneous reaction. B
Spontaneous redox reaction. C
Non-spontaneous reaction. D

Question # 9

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

Surrounding A
System and surrounding B
System C
State function D

Question # 10

When a system absorbs energy, the sign of delta E is

Neither positive nor negative A
Negative B
Positive C
None of above D

Question # 11

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

Remains constant. A
Decreases. B
Increases. C
Fluctuates rapidly. D

Question # 12

A reaction will also be called a spontaneous if :

It does no need energy to start with. A
It needs energy to carry the whole process. B
It needs energy at the end of reaction. C
It needs energy to stat with. D

Question # 13

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

Pink. A
Purple. B
Blue. C
Brown. D

Question # 14

Neutralization of a strong acid with a strong base is

Natural acid base reaction A
Artificial acid base reaction B
Spontaneous acid base reaction C
both a and c D

Question # 15

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

Oxidation reduction reaction A
Spontaneous reaction B
Spontaneous redox reaction C
Non-spontaneous reaction D

Question # 16

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

Spontaneous process A
Natural process B
Non-spontaneous process C
Both a and b D

Question # 17

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

Neutralization leads to the formation of salt and water. A
Strong acids and bases are ionic substances. B
Acids always give rise to H⁺ions and bases always furnish OH^-ions. C
The net chemical change involve the combination of H⁺ and OH^-ions to form water. D

Question # 18

When a piece of zinc is added to the copper sulphate solution, _______ colour of solution disappear

Pink A
Purple B
Blue C
Brown D

Question # 19

Burning of coal and hydrocarbon in air are examples of :

Non-spontaneous reaction. A
Spontaneous reaction. B
Natural reaction C
Both (a) and (C) D

Question # 20

Calorie is equivalent to :

0.4184 J A
4184 J B
4.184 J C
418.4 J D

Question # 21

In endothermic reactions, the heat contents of the surrounding air

Remains constant A
Decreases B
Increases C
Fluctuates rapidly D

Question # 22

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

Thermochemistry A
Biochemistry B
Physical chemistry C
Analytical chemistry D

Question # 23

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

Heat of reaction. A
Heat of formation. B
Heat of neutralization. C
Heat of combustion. D

Question # 24

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

First law of Themochemistry. A
First law of Thermodynamics. B
Second law of Themochemistry. C
Second law of Thermodynamics. D

Question # 25

The subject matter of first law of thermochemistry is based on

First law of Thermochemistry A
First law of Thermodynamics B
Second law of Thermochemistry C
Second law of Thermodynamics D

Question # 26

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

entahlpy change A
heat of sublimation B
bond energy C
internal energy change D

Question # 27

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

Endothermic. A
Heat of products. B
Exothermic reaction. C
Heat of reaction. D

Question # 28

Calorie is equivalent to

0.4184 J A
41.84 J B
4.184 J C
418.4 J D

Question # 29

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

remains constant A
increases B
decreases C
remain unchanged D

Question # 30

By state, we mean the

Reaction of system A
Scope of a system B
Condition of a system C
None of above D

Sr.#	Question	Answer
1	In a chemical change, the energy in the from of heat will either be evolved or absorbed and this is called:	A. Endothermic. B. Heat of products. C. Exothermic reaction. D. Heat of reaction.
2	Burning of coal and hydrocarbon in air are examples of :	A. Non-spontaneous reaction. B. Spontaneous reaction. C. Natural reaction D. Both (a) and (C)
3	When a system absorbs energy, the sign of delta E is	A. Neither positive nor negative B. Negative C. Positive D. None of above
4	The reaction of Zinc with copper sulphate solution is an example of	A. Oxidation reduction reaction B. Spontaneous reaction C. Spontaneous redox reaction D. Non-spontaneous reaction
5	Some Non-spontaneous process can be made to take place by supplying energy to the system from :	A. Internal source. B. Any source. C. External source. D. All of above.
6	Calorie is equivalent to	A. 0.4184 J B. 41.84 J C. 4.184 J D. 418.4 J
7	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	A. Henry's law B. Joule's princile C. Hess's law D. law of conservation of energy
8	Which one of the following is not related to spontaneous process.	A. Unidirectional. B. Real. C. Irreversible. D. Artificial.
9	Which of the following statements is contrary to the first law of thermodynamics?	A. Energy can neither be created no destroyed. B. One form of energy can be transferred into an equivalent amount of the kinds of energy. C. In a adiabatic process, the work done is independent of its path. D. Continuous production of mechanical work without supplying an equivalent amount of heat is possible.
10	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:	A. Spontaneous process. B. Natural process. C. Non-Spontaneous process. D. Both (a) and (b).

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