Top 5 NEET Coaching in Ranchi

बुद्धा साइन्स एंड टेक्निकल इंस्टीट्यूट
Buddha Science & Technical Institute
Kokar, Ranchi, Jharkhand
JOIN BSTI FOR : IIT-JEE / NEET With BHARAT SIR
PHYSICS : IMPORTANT QUESTION FOR IIT-JEE / NEET
Q. In a given process of an ideal gas, dW = 0 and dQ < 0. Then for the
gas
A. The temperature will decrease
B. The volume will increase
C. The pressure will remain constant
D. The temperature will increase
ANS : A
V.V.I.
QUESTION

Q. During the melting of a slab of ice at 273 K at atmospheric
pressure,
A. Positive work is done by the ice-water system on the atmosphere
B. Positive work is done on the ice-water system by the atmosphere
C. The internal energy of the ice-water system increases
D. The internal energy of the ice-water system decreases
ANS : B, C
V.V.I.
QUESTION

Q. Which of the following parameters does not characterize the
thermodynamic state of matter ?
A. Temperature
B. Pressure
C. Work
D. Volume
ANS : C
V.V.I.
QUESTION

Q. Which of the following is incorrect regarding the first law of
thermodynamics?
A. It introduces the concept of the internal energy
B. It introduces the concept of the entropy
C. It is not applicable to any cyclic process
D. It is a restatement of the principle of conservation of energy
ANS : B
V.V.I.
QUESTION

Q. Which of the following statements is correct for any
thermodynamic system ?
A. The internal energy changes in all processes
B. Internal energy and entopy are state functions
C. The change in entropy can never be zero
D. The work done in an adiabatic process is always zero
ANS : B
V.V.I.
QUESTION

Q. “Heat cannot itself flow from a body at lower temperature to a
body at higher temperature” is a statement or consequence of
A. Second law of thermodynamics
B. Conservation of momentum
C. Conservation of mass
D. First law of thermodynamics
ANS : A
V.V.I.
QUESTION

Q. Even Carnot engine cannot give 100% efficiency, because we
cannot
A. Prevent radiation
B. Find ideal sources
C. Reach absolute zero temperature
D. Eliminate friction
ANS : A
V.V.I.
QUESTION

Q. Which statement is incorrect ?
A. All reversible cycles have same efficiency
B. Reversible cycle has more efficiency than an irreversible one
C. Carnot cycle is a reversible one
D. Carnot cycle has the maximum efficiency of all the cycles
ANS : A
V.V.I.
QUESTION

Q. First law of thermodynamics corresponds to
A. Conservation of energy
B. Heat flow from hotter to cooler body
C. Law of conservation of angular momentum
D. Newton`s law of cooling
ANS : A
V.V.I.
QUESTION

Q. Which one of the following is not a state function ?
A. Temperature
B. Entropy
C. Pressure
D. Work
ANS : D
V.V.I.
QUESTION

Q. Which is an intensive property ?
A. Volume
B. Mass
C. Refractive index
D. Weight
ANS : C
V.V.I.
QUESTION

Q. The freezer in a refrigerator is located at the top section so that
A. The entire chamber of the refrigerator is cooled quickly due to
convection
B. The motor is not heated
C. The heat gained from the environment is high
D. The heat gained from the environment is low
ANS : A
V.V.I.
QUESTION

Q. Which of the following is not a thermodynamics co-ordinate ?
A. P
B. T
C. V
D. R
ANS : D
V.V.I.
QUESTION

Q. Which of the following is path dependent ?
A. U
B. P dV
C. P
D. V
ANS : B
V.V.I.
QUESTION

Q. In an adiabatic process, the quantity which remains constant is
A. Volume
B. Pressure
C. Temperature
D. Total heat of the system
ANS : D
V.V.I.
QUESTION

Q. A perfect gas is contained in a cylinder kept in vacuum. If the
cylinder suddenly bursts, then the temperature of the gas
A. Becomes zero K
B. Is decreased
C. Is increased
D. Remains unchanged
ANS : D
V.V.I.
QUESTION

Q. The increase in internal energy of a system is equal to the work
done on the system. Which process does the system undergo ?
A. Isochoric
B. Adiabatic
C. Isobaric
D. Isothermal
ANS : B
V.V.I.
QUESTION

Q. Heat capacity of a substance is infinite. It means
A. Heat is given out
B. Heat is taken out
C. No change in temperature, whether heat is taken in or given out
D. All of these
ANS : C
V.V.I.
QUESTION

Q. If the temperature of the source is increased, the efficiency of a
Carnot engine
A. Increases
B. Decreases
C. Remains constant
D. First increases and then remains constant
ANS : A
V.V.I.
QUESTION

Q. The first law of thermodynamics confirms the law of
A. Conservation of momentum of molecules
B. Conservation of energy
C. Flow of heat in a particular direction
D. Conservation of heat energy and mechanical energy
ANS : B
V.V.I.
QUESTION

Q. A sample of gas expands from volume V1 to V2 . The amount of
work done by the gas is greatest, when the expansion is
A. Isothermal
B. Isobaric
C. Adiabatic
D. Equal in all cases
ANS : B
V.V.I.
QUESTION

Q. Which of the following is not thermodynamical function ?
A. Enthalpy
B. Work done
C. Gibb`s energy
D. Internal energy
ANS : B
V.V.I.
QUESTION

Q. An ideal gas A and a real gas B have their volumes increased from
V to 2V under isothermal conditions.
The increase in internal energy
A. Will be same in both A and B
B. Will be zero in both the gases
C. Of B will be more than that of A
D. Of A will be more than that of B
ANS : B
V.V.I.
QUESTION

Q. Which of the following processes is reversible ?
A. Transfer of heat by conduction
B. Transfer of heat by radiation
C. Isothermal compression
D. Electrical heating of a nichrome wire
ANS : C
V.V.I.
QUESTION

Q. First law of thermodynamics is a special case of
A. Boyle`s law
B. Charle`s law
C. Law of conservation of mass
D. Law of conservation of energy
ANS : D
V.V.I.
QUESTION

Q. Which of the following is not a state function ?
A. Work done at constant pressure
B. Enthalpy
C. Work done by conservation force
D. Work done by non-conservative force
ANS : D
V.V.I.
QUESTION

Q. During adiabatic compression of a gas, its temperature
A. Falls
B. Remains constant
C. Rises
D. Becomes zero
ANS : C
V.V.I.
QUESTION

Q. Air in a cylinder is suddenly compressed by a piston, which is then
maintained at the same position. After some time, the
A. Pressure will increase
B. Pressure remains the same
C. Pressure will decrease
D. Pressure may increase or decrease
ANS : C
V.V.I.
QUESTION

Q. The door of a domestic refrigerator is kept open while the switch is
on. Then the room will
A. Get heated
B. Get neither heated nor cooled
C. Get cooled
D. Both (a) and (c)
ANS : A
V.V.I.
QUESTION

Q. A Carnot engine has efficiency 25%. It operates between reservoirs
of constant temperatures with temperature difference of 80˚C.
What is the temperature of the low-temperature reservoir ?
A. -25 ˚C B. 25 ˚C
C. -33 ˚C D. 33 ˚C
ANS : C
V.V.I.
QUESTION

Top 5 NEET Coaching in Ranchi

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Top 5 NEET Coaching in Ranchi