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

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hamza abid 27 - Jan - 2022 10 Min 50 Sec 20/120
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Mohsin rajput Rajput 21 - Sep - 2025 06 Min 38 Sec 9/30
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ECAT Physics Chapter 11 Important MCQ's

Sr.#	Question	Answer
1	The internal energy of an ideal gas system is generally the	A. translational K.E of molecules B. vibrational K.E of molecules C. rotational K.E of molecules D. all of them
2	Rice takes longest to cook	A. In a submarine 100 m below the surface of the sea B. At sea level C. At Murree D. At Mount Everest
3	If an amount of heat enters the system it could	A. decrease the internal energy B. not change the internal energy C. increase the internal energy D. none of them
4	A heat engine is that which converts	A. mechanical energy into thermal energy B. thermal energy into mechanical energy C. K.E into potential energy D. heat energy into light energy
5	The concept of entropy was introduced into the study of thermodynamics in	A. 1856 B. 1865 C. 1656 D. 1685
6	The efficiency of carnot engine cannot be 100% or one unless cold reservoir is at	A. 100 K B. 273 K C. 0 K D. -273 K
7	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
8	Triple point of water is	A. 273.16°F B. 372.16K C. 273.16°F D. 273.16
9	A succession of events which bring the system back to its initial condition is called	A. reversible process B. irreversible process C. a cycle D. none of them
10	On the compression stroke of the petrol engine, the inlet value is closed and the mixture is compressed	A. adiabatically B. isothermally C. isochorcally D. isobarically

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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 assumption of kinetic energy

A heat engine is that which converts

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

Sadi carnot described an ideal heat engine in

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

Pressure may be define as _______ per second per unit area:

One mole of any substance contain

The heat required to raise the temperature of one mole of the substance through 1 K is called

When heat is added into the system then change in entropy is

The basis to define a temperature scale that is independent of material properties is provided by

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

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

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 absolute temperature of the tripple point of water is

In all natural processes where heat flows from one system to another, there is always a net

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

R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes

At absolute temperature, the kinetic energy of the molecules

While deriving the equation for pressure of a gas we consider the

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

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

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

Absolute zero is considered as that temperature at which:

The bicycle pump provides a good example of

The Boltzman constant has the value

The heat required to raise the temperature of one mole of the gas through 1 K at constant volume is called

A gas is compressed adiabatically till its temperature is double. The ratio of its final volume to initial volume will be

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 curve representing an isothermal process is called

When two objects are rubbed together, their internal energy

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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: