ECAT Pre Engineering Chemistry Chapter 7 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 7 Thermo Chemistry

Try The MCQ's Test For ECAT Chemistry Chapter 7 Thermo Chemistry

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ECAT Chemistry Chapter 7 Thermo Chemistry

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Question # 1

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

Question # 2

One mole of oxygen confined in a cylinder fitted with a piston is an example of

Question # 3

When no work is done by the system

Question # 4

In endothermic reactions, the heat contents of the:

Question # 5

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:

Question # 6

Calorie is equivalent to :

Question # 7

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

Question # 8

When a system absorbs energy, the sign of delta E is

Question # 9

Reaction between Zn and CuSO4can be called a system under

Question # 10

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

Question # 11

The reaction of Zinc with copper sulphate solution is an example of

Question # 12

A reaction will also be called a spontaneous if

Question # 13

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

Question # 14

Calorie is equivalent to

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

A reaction will also be called a spontaneous if :

Question # 19

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

Question # 20

Which one of the following is not related to spontaneous process

Question # 21

The subject matter of first law of thermochemistry is based on:

Question # 22

By state, we mean the

Question # 23

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

Question # 24

The majority of reactions which give stable products are

Question # 25

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

Question # 26

The subject matter of first law of thermochemistry is based on

Question # 27

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

Question # 28

In a chemical change, the energy in the from of heat will either be evolved or absorbed and this is called:

Question # 29

Some Non-spontaneous process can be made to take place by supplying energy to the system from :

Question # 30

Burning of coal and hydrocarbon in air are examples of

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ECAT Chemistry Chapter 7 Important MCQ's

Sr.# Question Answer
1 The energy units in which heat changes usually expressed in Sl-system are:
A. Joule.
B. Calorie.
C. Kilo Joule.
D. Both (a) and (c)
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 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
4 When a system absorbs energy, the sign of delta E is
A. Neither positive nor negative
B. Negative
C. Positive
D. None of above
5 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
6 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
7 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
8 For a given process, the heat changes at constant volume ( qv)are related to other as:
A.

qp= qv

B.

qp<qv

C.

qp>qv

D.

qp=qv/2
9 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.
10 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.

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