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

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

Question # 2

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

Question # 3

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

Question # 4

In endothermic reactions, the heat contents of the surrounding air

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

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

Question # 7

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

Question # 8

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

Question # 9

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

Question # 10

Burning of coal and hydrocarbon in air are examples of

Question # 11

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

Question # 12

When a piece of zinc is added to the copper sulphate solution, _______ colour of solution disappear

Question # 13

Calorie is equivalent to

Question # 14

Burning of coal and hydrocarbon in air are examples of :

Question # 15

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

Question # 16

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

Question # 17

For the reaction : NaOH + HCl---------------> NaCl + H2O the change in enthalpy is called:

Question # 18

The subject matter of first law of thermochemistry is based on

Question # 19

The change in heat energy of a chemical reaction at constant temperature and pressure is called

Question # 20

By state, we mean the

Question # 21

Enthalpy of neutralization of all the strong acids and strong bases has the same value because:

Question # 22

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

Question # 23

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

Question # 24

Reaction between Zn and CuSO4can be called a system under

Question # 25

A reaction will also be called a spontaneous if :

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

Question # 27

The majority of reactions which give stable products are:

Question # 28

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

Question # 29

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

Question # 30

The majority of reactions which give stable products are

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ECAT Chemistry Chapter 7 Important MCQ's

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 The reaction of Zinc with copper sulphate solution is an example of
A. Oxidation reduction reaction
B. Spontaneous reaction
C. Spontaneous redox reaction
D. Non-spontaneous reaction
3 The majority of reactions which give stable products are:
A. Exothermic.
B. Isothermal.
C. Endothermic.
D. Both (b) and (c).
4 When a piece of zinc is added to the copper sulphate solution, _______ colour of solution disappear
A. Pink
B. Purple
C. Blue
D. Brown
5 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.
6 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.
7 Reaction between Zn and CuSO4can be called a system under
A. Surrounding
B. Observation
C. system
D. None of above
8 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
9 Some Non-spontaneous process 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 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

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