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	Pressure exerted by a gas is	A. Independent of density of the gas B. Inversely proportional to the density of the gas C. Directly proportional to the square of the density of the gas D. Directly proportional to the density of the gas
2	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
3	If the volume of the gas is to be increased by 4 times, then	A. Temperature and pressure must be doubled B. At constant P the temperature must be increased by 4 times C. At constant T the pressure must be increased by four times D. It cannot be increased
4	The example of reversible process is	A. an explosion B. changes occur suddenly C. slow compression of a gas D. all of them
5	Specific heat at constant pressure is greater than the specific heat at constant volume because	A. Heat is used up to increase temperature at constant pressure B. Heat is used by gas for expansions purposes at constant pressure C. Heat is use dup to increase internal energy D. The above statement is invalid
6	The product of the pressure and volume of an ideal gas is	A. A constant B. Approximately equal to the universal gas constant C. Directly proportional to its temperature D. Inversely proportional to its temperature
7	Hydrogen and helium of same volume V at same temperature T and same pressure P are mixed to have same volume V. The resulting pressure of the mixtures will be	A. R/2 B. P C. 2P D. Depending on the relative mass of the gases
8	Carnot heat engine only used	A. isothermal processes B. adiabatic processes C. both of them D. none of them
9	At O° K which of the following properties of a gas will be zero?	A. Kinetic energy B. Potential energy C. Vibrational energy D. Density
10	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

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

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

Sadi carnot described an ideal heat engine in

Brownian motion increases due to

Rate of diffusion is

A gas which strictly obeys the gas laws under all conditions of temperature and pressure is called:

The bicycle pump provides a good example of

In an adiabatic expansion, the temperature of the gas

The curve representing an adiabatic process is called

Real gases strictly obey gas law at:

A reversible cycle is the one in which

On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands

An amount of water of mass 20 g at 0°C is mixed with 40 g of water at 10°C. Final temperature of mixture is

If the distance between two charges is doubled, the force between them will become:

Electromagnetic waves emitted by hot bodies are called:

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

The example of irreversible process is

Which of the following does not have the same units:

Which quantity is important in stating the entropy of the system

The absolute temperature of the tripple point of water is

Energy gas behaves like an ideal gast at

If the formula PV = nRT, n denotes:

The efficiency of diesel engine is

If an amount of heat enters the system it could

On the exaust stroke, the outlet values opens. The residual gases are expelled and piston moves

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

At what temperature the adiabatic change is equivalent to the isothermal change?

At the constant temperature, if the value of a given mass of a gas is double, then the density of gas becomes:

On colliding in a closed container, the gas molecules

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ECAT Physics Chapter 11 Important MCQ's

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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:

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