ECAT Pre Engineering Chemistry Chapter 7 MCQ Test With Answer

Question # 1

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 # 2

In endothermic reactions, the heat contents of the surrounding air

Remains constant A
Decreases B
Increases C
Fluctuates rapidly D

Question # 3

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 # 4

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 # 5

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 # 6

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

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

Question # 7

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 # 8

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 # 9

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 # 10

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 # 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

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 # 13

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 # 14

Reaction between Zn and CuSO₄can be called a system under

Surrounding A
Observation B
system C
None of above D

Question # 15

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 # 16

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 # 17

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 # 18

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 # 19

The majority of reactions which give stable products are:

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

Question # 20

The majority of reactions which give stable products are

Exothermic A
Isothermal B
Endothermic C
Both a and c D

Question # 21

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 # 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

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 # 24

Work is a

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

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 # 27

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 # 28

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 # 29

A state function is a

Microscopic property A
Macroscopic B
Unique property C
Both a and c 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	When a piece of zinc is added to the copper sulfate solution,____________ color of solution disappear.	A. Pink. B. Purple. C.Blue. D. Brown.
2	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
3	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
4	A state function is a	A. Microscopic property B. Macroscopic C.Unique property D. Both a and c
5	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.
6	The change in heat energy of a chemical reaction at constant temperature and pressure is called :	A. Enthalpy change. B. Seat of sublimation. C.Bind energy. D. Internal energy change.
7	By comparing both initial and final states of the system, we can describe the change taking place in the	A. Surrounding B. Both a and c C.System D. None of above
8	One mole of oxygen confined in a cylinder fitted with a piston is an example of	A. Surrounding B. System and surrounding C.System D. State function
9	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:	A. Henry's law. B. Joule's principle. C.Hess's law. D. Law of conservation of energy.
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
11	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	A. Spontaneous process B. Natural process C.Non-spontaneous process D. Both a and b
12	The majority of reactions which give stable products are	A. Exothermic B. Isothermal C.Endothermic D. Both a and c
13	Reaction between Zn and CuSO₄can be called a system under	A. Surrounding B. Observation C.system D. None of above
14	The study of heat changes accompanying a chemical reaction is known as	A. Thermochemistry B. Biochemistry C.Physical chemistry D. Analytical chemistry
15	Work is a	A. State function B. Only function C.Non-state function D. State
16	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
17	The study of heat changes accompanying a chemical reaction is known as :	A. Thermochemistry. B. Biochemistry. C.Physical chemistry. D. Analytical chemistry.
18	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.
19	When a system absorbs energy, the sign of delta E is	A. Neither positive nor negative B. Negative C.Positive D. None of above
20	Which of the following statements is contrary to the first law of themodynamics	A. Energy can neither be created nor destroyed B. One form of energy can be transferred into an equivalent amount of other kinds of energy C.In an adiabatic process, the work done is independent of its path D. Continuous production of mechanical work without supplying and equivalent amount of heat is possible
21	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)
22	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
23	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)
24	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
25	If an endothermic reaction is allowed to take place very rapidly in air, the temperature of the surrounding air	A. Remains constant B. Decreases C.Increases D. Fluctuates rapidly

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