ECAT Pre Engineering Chemistry Chapter 7 MCQ Test With Answer

Question # 1

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 # 2

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 # 3

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 # 4

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 # 5

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 # 6

Burning of coal and hydrocarbon in air are examples of

Non-spontaneous reaction A
Spontaneous reaction B
Natural reaction C
Both b and c D

Question # 7

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 # 8

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 # 9

Some non-spontaneous processes 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 # 10

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

Thermochemistry. A
Biochemistry. B
Physical chemistry. C
Analytical chemistry. D

Question # 11

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 # 12

Reaction between Zn and CuSO₄can be called a system under

Surrounding A
Observation B
system C
None of above D

Question # 13

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

Imaginary line A
Boundary B
Real line C
All of above D

Question # 14

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

Physical change A
Chemical change B
Biological change C
All of above D

Question # 15

For a given process, the heat changes at constant volume ( q_v)are related to other as:

q_p= q_v
A
q_p<q_v
B
q_p>q_v
C
q_p=q_v/2
D

Question # 16

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

Unidirectional.
A
Real. B
Irreversible.
C
Artificial. D

Question # 17

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 # 18

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

Energy can neither be created no destroyed. A
One form of energy can be transferred into an equivalent amount of the kinds of energy. B
In a adiabatic process, the work done is independent of its path. C
Continuous production of mechanical work without supplying an equivalent amount of heat is possible. D

Question # 19

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

Surrounding A
Both a and c B
System C
None of above D

Question # 20

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 # 21

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:

Henry's law. A
Joule's principle. B
Hess's law. C
Law of conservation of energy. D

Question # 22

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 # 23

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

Joule A
Calorie B
Kilo Joule C
Both a and c D

Question # 24

Work is a

State function A
Only function B
Non-state function C
State D

Question # 25

Calorie is equivalent to

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

Question # 26

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 # 27

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 # 28

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

Thermochemistry A
Biochemistry B
Physical chemistry C
Analytical chemistry D

Question # 29

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 # 30

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

Sr.#	Question	Answer
1	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.
2	The study of heat changes accompanying a chemical reaction is known as	A. Thermochemistry B. Biochemistry C. Physical chemistry D. Analytical chemistry
3	When a piece of zinc is added to the copper sulphate solution, _______ colour of solution disappear	A. Pink B. Purple C. Blue D. Brown
4	The subject matter of first law of thermochemistry is based on:	A. First law of Themochemistry. B. First law of Thermodynamics. C. Second law of Themochemistry. D. Second law of Thermodynamics.
5	Some non-spontaneous processes 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	If an endothermic reaction is allowed to take place very rapidly in the air, the temperature of the surrounding air:	A. Remains constant. B. Increase. C. Decreases. D. Remain unchanged.
7	By state, we mean the	A. Reaction of system B. Scope of a system C. Condition of a system D. None of above
8	In endothermic reactions, the heat contents of the:	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)
9	A reaction will also be called a spontaneous if :	A. It does no need energy to start with. B. It needs energy to carry the whole process. C. It needs energy at the end of reaction. D. It needs energy to stat with.
10	For a given process, the heat changes at constant volume ( q_v)are related to other as:	A. q_p= q_v B. q_p<q_v C. q_p>q_v D. q_p=q_v/2

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