ECAT Pre General Science Chapter 11 online mcq test with answers for Physics chapter 11 (Heart & Thermodynamics)

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ECAT Physics Chapter 11 Important MCQ's

Sr.#	Question	Answer
1	In the reverse process, the working substance passes through the same stages as in the direct process and	A. thermal effects at each stage are exactly reversed B. mechanical effects at each stage are exactly reversed C. thermal and mechanical effects at each stage remain the same D. thermal and mechanical effects at each stage are exactly reversed
2	The work done on the system by the environment is considered as	A. positive B. negative C. zero D. any one of them
3	In an ideal gas, the molecules have:	A. Kinetic energy only B. Potential energy only C. Both KE and PE D. None of these
4	Real gases strictly obey gas law at:	A. High pressure and low temperatures B. Low pressures and high temperatures C. High pressures and high temperatures D. None of these
5	The behaviour of gases is well accounted by the kinetic theory based on	A. microscopic approach B. macroscopic approach C. both of them D. none of them
6	If water in a closed bottle is taken up to the moon and opened, the water gets	A. Freeze B. Boiled C. Dissociated into O₂and H₂ D. Evaporated
7	At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:	A. Double B. Remains constant C. Half D. None of these
8	If 42 J heat is transferred to the system and the work done by the system is 32 J then what will be the change in internal energy	A. 0 J B. 2 J C. 5 J D. 10 J
9	When two objects are rubbed together, their internal energy	A. remains same B. decreases C. remains the same then decreases D. increases
10	The process which is carried out at constant temperature is known as	A. adiabatic process B. isothermal process C. isochoric process D. none of them

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ECAT Pre General Science Physics Chapter 11 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics

ECAT Pre General Science Physics Chapter 11 Heat & Thermodynamics

If a process cannot be retraced in the backward direction by reversing the controlling factors, it is

For making cooking utensils, which of the following pairs of properties is most suited?

The work done by the system on its environment is considered as

The highest efficiency of a heat engine whose low temperature is 17°C and the high temperature is 200°C is

Brownian motion increases due to

The coefficient of linear expansion of iron is 0.000011 per°K. An iron rod is 10 metre long at 27°C. The length of the rod will be decreased by 1.1 mm when the temperature of the rod changes to

If a molecule with momentum mv strikes a wall and rebound then the change in momentum will be:

An isochoric process is one which take place at

At constant temperature, if the density of the gas is increased, its pressure will:

First law of thermodynamics is consequence of conservation of

In the reverse process, the working substance passes through the same stages as in the direct process and

Efficiency of carnot engine is independent of the

Good absorbers of heat are

The unit of thermodynamical scale is

Maximum density of H2O is at the temperature

Boyle's law is applicable in

Which of the following is not thermo dynamical function?

Two metal rods A and B have their initial lengths in the ratio 2 : 3 and coefficients of linear expansion in the ratio 4 : 3. When they are heated through same temperature difference the ratio of their linear expansion is

When the temperature of source and sink of a heat engine become equal entropy change will be

During the whole carnot cycle

The value of E0in coulomb's law is:

The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to

Sadi carnot described an ideal heat engine in

The only significant motion possessed by the mono-atomic gas represented is:

10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?

When two objects come to common temperature, the body is said to be in:

According to the second law, which is must to produce work

If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I3gives the:

We can express the work in term of

We cannot utilize the heat contents of oceans and atmosphere because

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ECAT Physics Chapter 11 Important MCQ's

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Maximum density of H₂O is at the temperature

The value of E₀in coulomb's law is:

If denotes the total number of molecules in cubic vessel such that m is mass of each milecule and I is length of each side of vessel, then mN/I³gives the: