ECAT Pre Engineering Chemistry Chapter 7 MCQ Test With Answer

Question # 1

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 # 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

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 # 4

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 # 5

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 # 6

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 # 7

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

Joule. A
Calorie. B
Kilo Joule. C
Both (a) and (c) D

Question # 8

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 # 9

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 # 10

Reaction between Zn and CuSO₄can be called a system under

Surrounding A
Observation B
system C
None of above D

Question # 11

By state, we mean the

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

Question # 12

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 # 13

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 # 14

Calorie is equivalent to :

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

Question # 15

Work is a

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

Question # 16

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 # 17

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

Thermochemistry A
Biochemistry B
Physical chemistry C
Analytical chemistry D

Question # 18

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 # 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

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 # 21

The majority of reactions which give stable products are:

Exothermic. A
Isothermal. B
Endothermic. C
Both (b) and (c). D

Question # 22

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 # 23

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 # 24

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

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

Question # 25

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

Remains constant. A
Increase. B
Decreases. C
Remain unchanged. D

Question # 26

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 # 27

It is noticed that energy in the from 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 # 28

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 # 29

A reaction will also be called a spontaneous if

It does not 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 start with D

Question # 30

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

Sr.#	Question	Answer
1	The majority of reactions which give stable products are	A. Exothermic B. Isothermal C. Endothermic D. Both a and c
2	Which one of the following is not related to spontaneous process.	A. Unidirectional. B. Real. C. Irreversible. D. Artificial.
3	A reaction will also be called a spontaneous if	A. It does not 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 start with
4	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).
5	The real or imaginary surface separating the system from the surrounding is called	A. Imaginary line B. Boundary C. Real line D. All of above
6	In a chemical change, the energy in the form 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
7	The reaction of zinc with the copper sulfate solution is an example of.	A. Oxidation reduction reaction. B. Spontaneous reaction. C. Spontaneous redox reaction. D. Non-spontaneous reaction.
8	The study of heat changes accompanying a chemical reaction is known as :	A. Thermochemistry. B. Biochemistry. C. Physical chemistry. D. Analytical chemistry.
9	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
10	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)

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