First Law of Thermodynamics in Hindi

First Law of Thermodynamics in Hindi. We covered all the First Law of Thermodynamics in Hindi in this post for free so that you can practice well for the exam.

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Mock test on First Law of Thermodynamics for Students

A thermodynamic system absorbs 300 calories of Heat and performs 600 J of work. What is the change in its internal energy? (Given: 1 cal = 4.18 J)

a) −528.2 J

b) −300 J

c) 156.5 J

d) 654 J

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The first law of Thermodynamics is fundamentally based on which principle?

a) Conservation of Mass

b) Conservation of momentum

c) Conservation of energy

d) Exchange of Heat

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For a fixed Mass of gas, 20 J of Heat is released and 8 J of work is done on the gas. If the initial internal energy is 30 J, what will be the final internal energy?

a) 2 J

b) 18 J

c) 42 J

d) 50 J

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A gaseous system has an internal energy of 40 J. If 110 J of Heat is supplied to it, how much work is done by the system?

a) 150 J

b) 110 J

c) 70 J

d) 40 J

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If 110 J of Heat is added to a gas and its internal energy increases by 40 J, determine the external work done.

a) 40 J

b) 70 J

c) 110 J

d) 150 J

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When the work done is 300 calories and the increase in internal energy is 167 calories, how much Heat is supplied to the system?

a) 166 cal

b) 333 cal

c) 500 cal

d) 400 cal

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Which of the following expressions correctly represents the first law of Thermodynamics?

a) dQ = dU + PdV

b) dQ = (dU + dV)P

c) dQ = dU × PdV

d) dQ = PdU + dV

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The first law of Thermodynamics deals with the conservation of:

a) Mass

b) energy

c) Momentum

d) Temperature

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For a thermodynamic system, if dU is the change in internal energy and dW is the work done by the system, which statement is correct?

a) dU = −dW during an isothermal process

b) dU = dW during an isothermal process

c) dU = −dW during an adiabatic process

d) dU = dW during an adiabatic process

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A gas expands from 2 m³ to 6 m³ at a constant pressure of 10 N/m². It is then heated at constant volume (6 m³), increasing the pressure from 10 N/m² to 20 N/m². What is the total work done by the gas?

a) 40 erg

b) 40 J

c) 60 J

d) 100 J

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For an ideal gas undergoing an isothermal process, dU = 0. In this case, the Heat supplied dQ is equal to:

a) 0.5 dW

b) dW

c) 1.5 dW

d) 2 dW

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We covered all the first law of Thermodynamics in Hindi above in this post for free so that you can practice well for the exam.

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Also, check out:

• Boyle’s Law in Hindi
• Surface Tension in Hindi
• MCQ on Surface Tension