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NEET Exam  >  NEET Tests  >  Case Based Questions Test: Thermodynamics - NEET MCQ

Case Based Questions Test: Thermodynamics - NEET MCQ


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8 Questions MCQ Test - Case Based Questions Test: Thermodynamics

Case Based Questions Test: Thermodynamics for NEET 2024 is part of NEET preparation. The Case Based Questions Test: Thermodynamics questions and answers have been prepared according to the NEET exam syllabus.The Case Based Questions Test: Thermodynamics MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Case Based Questions Test: Thermodynamics below.
Solutions of Case Based Questions Test: Thermodynamics questions in English are available as part of our course for NEET & Case Based Questions Test: Thermodynamics solutions in Hindi for NEET course. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free. Attempt Case Based Questions Test: Thermodynamics | 8 questions in 16 minutes | Mock test for NEET preparation | Free important questions MCQ to study for NEET Exam | Download free PDF with solutions
Case Based Questions Test: Thermodynamics - Question 1
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Entropy is a measure of degree of randomness. Entropy is directly proportional to temperature. Every system tries to acquire maximum state of randomness or disorder. Entropy is a measure of unavailable energy. Unavailable energy = Entropy × Temperature The ratio of Entropy of Vaporization and boiling point of a substance remains almost constant. Answer the given below questions (i) to (iv).

Q. Which of the following has S = +ve?

Detailed Solution for Case Based Questions Test: Thermodynamics - Question 1
Boiling of egg leads to denaturation of proteins which has random coil structure. Hence, ΔS = +ve.
Case Based Questions Test: Thermodynamics - Question 2
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Entropy is a measure of degree of randomness. Entropy is directly proportional to temperature. Every system tries to acquire maximum state of randomness or disorder. Entropy is a measure of unavailable energy. Unavailable energy = Entropy × Temperature The ratio of Entropy of Vaporization and boiling point of a substance remains almost constant. Answer the given below questions (i) to (iv).

Q. Which of the following has S = – ve?

Detailed Solution for Case Based Questions Test: Thermodynamics - Question 2
In case of adsorption entropy decreases due to attraction between adsorbent and adsorbate.
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Case Based Questions Test: Thermodynamics - Question 3
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Entropy is a measure of degree of randomness. Entropy is directly proportional to temperature. Every system tries to acquire maximum state of randomness or disorder. Entropy is a measure of unavailable energy. Unavailable energy = Entropy × Temperature The ratio of Entropy of Vaporization and boiling point of a substance remains almost constant. Answer the given below questions (i) to (iv).

Q. The sign of ΔS in the reaction, N2(g) + O2(g) → 2NO(g) is:

Detailed Solution for Case Based Questions Test: Thermodynamics - Question 3

It is an endothermic pressure. It will spontaneous only if ΔS = +ve.

Case Based Questions Test: Thermodynamics - Question 4
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Entropy is a measure of degree of randomness. Entropy is directly proportional to temperature. Every system tries to acquire maximum state of randomness or disorder. Entropy is a measure of unavailable energy. Unavailable energy = Entropy × Temperature The ratio of Entropy of Vaporization and boiling point of a substance remains almost constant. Answer the given below questions (i) to (iv).

Q. The law of thermodynamics, which helps to determine absolute Entropy is:
Detailed Solution for Case Based Questions Test: Thermodynamics - Question 4
Nernst invented third law of thermodynamics which helps to determine absolute entropy of various substances.
Case Based Questions Test: Thermodynamics - Question 5
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The internal energy of a system may be changed either by allowing the exchange of heat with the surroundings or by doing work on the system. If the reaction is carried out at a constant volume, pressure-volume work done is zero. We know that qp = qv + ngRT. Internal energy is an extensive property and a state function. The questions from (i) to (iv) consist of an assertion (A) and reason (R). Choose the correct option:

Assertion: Internal energy of a system is an extensive property.

Reason: The internal energy of a system depends upon the physical state and amount of the substance.
Detailed Solution for Case Based Questions Test: Thermodynamics - Question 5
As internal energy is U = mcvdT so it depends upon mass m, and specific heat cv, i.e., it depends upon amount and state of the substance.

So Internal energy is an extensive property of system.

For example if we take a container filled with gas and partition it into two halves, mass in each side also get halved, thus internal energy U = mcvdT is also reduced to half.

Case Based Questions Test: Thermodynamics - Question 6
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The internal energy of a system may be changed either by allowing the exchange of heat with the surroundings or by doing work on the system. If the reaction is carried out at a constant volume, pressure-volume work done is zero. We know that qp = qv + ngRT. Internal energy is an extensive property and a state function. The questions from (i) to (iv) consist of an assertion (A) and reason (R). Choose the correct option:

Assertion: Absolute value of internal energy (U) cannot be determined.

Reason: Internal energy is a sum of many types of energies, that depend on several factors.
Detailed Solution for Case Based Questions Test: Thermodynamics - Question 6
Internal energy is given by

Accurate measurement of some forms of energy which contribute to the absolute value of internal energy for a given substance in a given state is impossible. So difference of the initial state and final state is calculated and is denoted by

ΔE = Ef - Ei

Case Based Questions Test: Thermodynamics - Question 7
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The internal energy of a system may be changed either by allowing the exchange of heat with the surroundings or by doing work on the system. If the reaction is carried out at a constant volume, pressure-volume work done is zero. We know that qp = qv + ngRT. Internal energy is an extensive property and a state function. The questions from (i) to (iv) consist of an assertion (A) and reason (R). Choose the correct option:

Assertion: Work and internal energy of a system are state functions.

Reason: The sum of q + w is a state function.
Detailed Solution for Case Based Questions Test: Thermodynamics - Question 7
w and q are not state functions they are path function, whereas ΔU = q + w is state function.
Case Based Questions Test: Thermodynamics - Question 8
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The internal energy of a system may be changed either by allowing the exchange of heat with the surroundings or by doing work on the system. If the reaction is carried out at a constant volume, pressure-volume work done is zero. We know that qp = qv + ngRT. Internal energy is an extensive property and a state function. The questions from (i) to (iv) consist of an assertion (A) and reason (R). Choose the correct option:

Assertion: The increase in energy (U) for the vaporization of one mole in water at 1 atm and 373 K is zero.

Reason: For gaseous isothermal processes, U = 0.
Detailed Solution for Case Based Questions Test: Thermodynamics - Question 8
Internal energy increases with rise in temperature. ΔU = 0 is only for ideal gases.
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