ECAT Pre Engineering Chemistry Chapter 7 MCQ Test With Answer

Question # 1

Reaction between Zn and CuSO₄can be called a system under

Surrounding A
Observation B
system C
None of above D

Question # 2

Calorie is equivalent to :

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

Question # 3

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 # 4

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 # 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

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 # 7

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 # 8

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 # 9

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 # 10

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 # 11

In endothermic reactions, the heat contents 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

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 # 14

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 # 15

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 # 16

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 # 17

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 # 18

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 # 19

By state, we mean the

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

Question # 20

The majority of reactions which give stable products are:

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

Question # 21

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

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

Question # 22

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 # 23

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 # 24

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 # 25

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 # 26

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 # 27

Work is a

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

Question # 28

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 # 29

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 # 30

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

Sr.#	Question	Answer
1	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.
2	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.
3	The majority of reactions which give stable products are:	A. Exothermic. B. Isothermal. C. Endothermic. D. Both (b) and (c).
4	It is noticed that energy in the from of heat is either evolved or absorbed as a result of a:	A. Physical change. B. Chemical change. C. Biological change. D. All of above.
5	Reaction between Zn and CuSO₄can be called a system under	A. Surrounding B. Observation C. system D. None of above
6	When a piece of zinc is added to the copper sulphate solution, _______ colour of solution disappear	A. Pink B. Purple C. Blue D. Brown
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	For the reaction : NaOH + HCl---------------> NaCl + H₂O the change in enthalpy is called:	A. Heat of reaction. B. Heat of formation. C. Heat of neutralization. D. Heat of combustion.
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	When no work is done by the system	A. The volume of system decreases B. The volume of system increases C. The volume of system does not change D. None of above

Latest Educational News Stories

Pakistan's Largest Database of Colleges and Universities

BS Programs

University Past Papers

University Results

Exam Results 2024

Study Abroad Programs and Opportunities for Pakistani Students