ECAT Pre Engineering Chemistry Chapter 7 MCQ Test With Answer

Question # 1

Which of the following statements is contrary to the first law of themodynamics

Energy can neither be created nor destroyed A
One form of energy can be transferred into an equivalent amount of other kinds of energy B
In an adiabatic process, the work done is independent of its path C
Continuous production of mechanical work without supplying and equivalent amount of heat is possible D

Question # 2

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 # 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

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 # 5

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 # 6

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 # 7

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 # 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

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

Thermochemistry A
Biochemistry B
Physical chemistry C
Analytical chemistry D

Question # 10

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 # 11

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 # 12

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 # 13

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 # 14

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 # 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

A state function is a

Microscopic property A
Macroscopic B
Unique property C
Both a and c D

Question # 17

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 # 18

Calorie is equivalent to

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

Question # 19

The majority of reactions which give stable products are

Exothermic A
Isothermal B
Endothermic C
Both a and c D

Question # 20

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 # 21

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 # 22

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 # 23

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 # 24

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 # 25

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 # 26

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 # 27

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 # 28

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 # 29

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 # 30

Which one of the following is not related to spontaneous process

Unidirectional A
Real B
Irreversible C
Artificial D

Sr.#	Question	Answer
1	By state, we mean the	A. Reaction of system B. Scope of a system C. Condition of a system D. None of above
2	Enthalpy of neutralization of all the strong acids and strong bases has the same value because:	A. Neutralization leads to the formation of salt and water. B. Strong acids and bases are ionic substances. C. Acids always give rise to H⁺ions and bases always furnish OH^-ions. D. The net chemical change involve the combination of H⁺ and OH^-ions to form water.
3	If an endothermic reaction is allowed to take place very rapidly in the air, the temperature of the surrounding air	A. remains constant B. increases C. decreases D. remain unchanged
4	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
5	Neutralization of a strong acid with a strong base is	A. Natural acid base reaction B. Artificial acid base reaction C. Spontaneous acid base reaction D. both a and c
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	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
8	The majority of reactions which give stable products are:	A. Exothermic. B. Isothermal. C. Endothermic. D. Both (b) and (c).
9	Work is a	A. State function B. Only function C. Non-state function D. State
10	It is noticed that energy in the form 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

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