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 an ideal gas, the molecules have:	A. Kinetic energy only B. Potential energy only C. Both KE and PE D. None of these
2	A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be	A. 1/2 B. More than 1/2 C. Less than 1/2 D. Between 1 and 2
3	Adiabatic change occurs when the gas	A. expands B. compressed C. expands or compressed D. expands or compressed rapidly
4	The unit of thermodynamical scale is	A. centigrade B. fahrenheit C. kelvin D. none of them
5	In case of an ideal gas, the P.E associated with its molecule is	A. maximum B. zero C. minimum D. not fixed
6	In a heat engine, heat is supplied by the	A. cold reservoir B. sink C. hot reservoir D. none of them
7	First law of thermodynamic is special case of	A. Law of conservation of energy B. Charle's law C. Law of conservation of mass D. Boyle's law
8	The ideal gas law is	A. P = nRT B. V = nRT C. PV =RT D. PV =nRT
9	If a liquid is heated in weightlessness, the heat is transmitted through	A. Conduction B. Convection C. Radiation D. Neither, because the liquid cannot be heated in weightlessness
10	The earliest heat engine was	A. petrol engine B. diesel engine C. electric engine D. steam engine

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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

On colliding in a closed container, the gas molecules

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

In the study of thermodynamics, which gas is considered as the working substance

Pressure applied at any point of gas at rest is transmitted equally to all parts of the gas. This is the statement of:

First law of thermodynamics is consequence of conservation of

The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :

During the whole carnot cycle

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

The ideal gas law is

Two samples A and B of a gas initially of the same temperature and pressure are compressed from a volume V to a volume V/2 such that A is compressed isothermally and B adiabatically. The final pressure

Average KE of a gas molecule has:

If R is gas constant for 1 gram mole, Cpand Cvare specific heat for a solid then

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

Electromagnetic waves emitted by hot bodies are called:

An irreversible heat flow from a hot to cold substances of a system, causes the disorder to

The nature of thermal radiation is similar to:

Generally a temperature scale is established by

At constant temperature, on increasing the pressure of a gas by 5%, its volume. The final temperature of the gas will be

The second law of thermodynamics is concerned with the circumstances in which

It is impossible to devise a processes which may convert heat, extracted from a single reservoir, entirely into work without leaving any change in the working system. This is the statement of

The percentage of available heat energy converted into work by a diesel engine is roughly

One mole of any substance contain

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

If the volume of the gas is to be increased by 4 times, then

Since the absolute scale is independent of the property of the working substance, hence, can be applied at

The pressure of gas everywhere inside the vessel will be the same provided the gas is of

The efficiency of diesel engine is

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:

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

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ECAT Physics Chapter 11 Important MCQ's

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If R is gas constant for 1 gram mole, C_pand C_vare specific heat for a solid then

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: