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	What temperature is the same on Celsius scale as well as on Fahrenheit scale?	A. 32°C B. -32°C C. -40°C D. -212°C
2	The second law of thermodynamics is concerned with the circumstances in which	A. heat can be converted into work B. direction of flow of heat C. none of them D. both of them
3	The example of irreversible process is	A. slowly liquification B. slowly evaporation C. an explosion D. all of them
4	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
5	If a process cannot be retraced in the backward direction by reversing the controlling factors, it is	A. a reversible process B. an irreversible process C. any one of them D. both of them
6	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
7	The kinetic energy of one molecule of a gas at normal temperature and pressure will be (k = 8.31 J/mole K) :	A. 1.7 x 10³J B. 10.2 x 10³J C. 3..4 x 10³J D. 6.8 x 10³J
8	The volume of universal gas constant R is:	A. 8.314 J/K mole K B. 8314 J/K mole K C. 8.314 J/mole K D. None of these
9	R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes	A. 2V B. 3V C. 0.5V D. V
10	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

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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

First law of thermodynamics is consequence of conservation of

At O° K which of the following properties of a gas will be zero?

The example of irreversible process is

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

The disorder in the system increases due to the

Truth of kinetic energy is confirmed by:

Which quantity is important in stating the entropy of the system

Rate of diffusion is

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

One mole of any substance contain

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

A succession of events which bring the system back to its initial condition is called

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

If N is the total number of molecules and V is the volume of the container, then the expression for the pressure of gas is

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

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

The volume of universal gas constant R is:

A process is a reversible process, if the entropy of the system

Heat travels through vacuum by

Maximum density of H2O is at the temperature

The nature of thermal radiation is similar to:

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:

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

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

The process which is carried out at constant temperature is known as

The state in which ice, water and vapour coexists in equilibrium is called

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

If the ratio of densities of two gases is 1:4, then the ratio of their rates of diffusion into one another is

The rate of change of momentum of a molecule is equal to:

If the formula PV = nRT, n denotes:

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ECAT Physics Chapter 11 Important MCQ's

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Maximum density of H₂O is at the temperature

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: