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	A reversible cycle is the one in which	A. some of the changes are reversible B. all of the changes are reversible C. all of the changes are irreversible D. none of them
2	Boyle's law is applicable in	A. Isochoric process B. Isothermal process C. Isobaric process D. Isotonic process
3	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
4	The Boltzman constant has the value	A. 1.38 x 10^-23JK^-1 B. 1.28 x 10^-23JK^-1 C. 1.38 x 10^-26JK^-1 D. 1.28 x 10^-26JK^-1
5	If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is	A. 2 : 1 B. 4 : 1 C. 1 : 4 D. 3 : 4
6	In all natural processes where heat flows from one system to another, there is always a net	A. decrease in entropy B. increase in entropy C. decrease or increase in entropy D. none of them
7	If R is gas constant for 1 gram mole, C_pand C_vare specific heat for a solid then	A. C_p- C_v= R B. C_p- C_{v < R} C. C_p- C_{v = 0} D. C_p- C_{v > R}
8	At constant temperature, if the density of the gas is increased, its pressure will:	A. One kg of a substance B. Unit volume of a substance C. One mole of a substance D. None of these
9	The rate of change of momentum of a molecule is equal to:	A. Pressure B. Work C. Density D. Force
10	First law of thermodynamics tells us that heat energy can be converted into equivalent amount of work, but it is silent about	A. how heat is absorbed B. how heat extracted C. how this conversion takes place 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

Which of the following is not an example of adiabatic process

The concept of entropy was introduced into the study of thermodynamics in

The example of irreversible process is

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

In which process the condition for the application of Boyle's law on the gas is fulfilled

Gas constant per molecule is called:

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

On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed

Which of the following is not thermo dynamical function?

In an ideal gas, the molecules have:

In thermodynamics, internal energy is the function of

Carnot heat engine only used

Boyle's law is applicable in

Rate of diffusion is

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

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

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

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

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

When two objects are rubbed together, their internal energy

Absolute zero is considered as that temperature at which:

Generally a temperature scale is established by

A heat engine is that which converts

The Boltzman constant has the value

The curve representing an adiabatic process is called

Pressure exerted by a gas is

The number of translation degress of freedom for a diatomic gas is

What temperature is the same on Celsius scale as well as on Fahrenheit scale?

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

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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: