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CBSE Class 11 (Science) Thermal Properties of Matter & Thermodynamics — practice questions — page 4

Explore 267 free Thermal Properties of Matter & Thermodynamics questions in CBSE Class 11 (Science) Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Thermal Properties of Matter & Thermodynamics questions and exercises with answers

Showing questions 91–120 of 267.

Which kind of solid can keep a residual entropy well above zero at absolute zero?Read the answer and worked solution →A machine claimed to produce work with no energy input violates theRead the answer and worked solution →In a natural process, the total entropy of the interacting systemsRead the answer and worked solution →In a reversible heat transfer, the heat element δQ equalsRead the answer and worked solution →At absolute zero, a system is in the state of minimum thermal energy known as itsRead the answer and worked solution →For an isolated system, the first law implies that its total energyRead the answer and worked solution →Natural processes tend toward spatial uniformity of temperature. Which law describes this?Read the answer and worked solution →The zeroth law makes thermal equilibrium a relation of which type?Read the answer and worked solution →In thermodynamics, which term names the part of the universe being observed?Read the answer and worked solution →The universe in thermodynamics is the sum of which two parts?Read the answer and worked solution →Reactants kept in an open beaker form which kind of system?Read the answer and worked solution →Which exchange is possible in a closed system?Read the answer and worked solution →Reactants sealed inside a thermos flask form which system?Read the answer and worked solution →What is exchanged between an isolated system and its surroundings?Read the answer and worked solution →A sealed copper vessel containing reactants is an example of what?Read the answer and worked solution →What is the wall that separates a system from its surroundings called?Read the answer and worked solution →Why are p, V and T called state functions?Read the answer and worked solution →Which of these is an extensive property?Read the answer and worked solution →A gas container is split into two equal halves by a partition. Which property is unchanged in each half?Read the answer and worked solution →What is an adiabatic process?Read the answer and worked solution →Under the IUPAC convention, when is the work w positive?Read the answer and worked solution →Under the IUPAC convention, q is positive when what happens?Read the answer and worked solution →Which equation is the mathematical statement of the first law?Read the answer and worked solution →What is ΔU for an isolated system where w = 0 and q = 0?Read the answer and worked solution →Which quantity can thermodynamics measure only as a change, never as an absolute value?Read the answer and worked solution →A system takes in 500 J of heat and does 200 J of work. What is ΔU?Read the answer and worked solution →A system gives out 150 J as heat while 400 J of work is done on it. What is ΔU?Read the answer and worked solution →A system gets work but no heat, so its wall is of which type?Read the answer and worked solution →What is the sign of w when a gas is compressed?Read the answer and worked solution →Which statement describes a reversible process?Read the answer and worked solution →

Worked practice questions

Which kind of solid can keep a residual entropy well above zero at absolute zero?

  1. A perfect crystal
  2. A glassy solid
  3. A diamond crystal
  4. A pure metal
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Correct answer: B. A glassy solid

Non-crystalline solids such as glass are the stated exception to residual entropy being close to zero.

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A machine claimed to produce work with no energy input violates the

  1. third law
  2. zeroth law
  3. first law
  4. second law
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Correct answer: C. first law

Such a perpetual motion machine of the first kind creates energy, which the first law forbids.

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In a natural process, the total entropy of the interacting systems

  1. always decreases
  2. never decreases
  3. must oscillate
  4. stays zero
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Correct answer: B. never decreases

The second law states the sum of entropies of interacting systems never decreases in a natural process.

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