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Physics MCQ

Heat · ICSE STD 10 (ICSE - English Medium). 6 questions.

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6 questions · timed · auto-graded

MCQ 11 Mark
A solid is heated at a constant rate in an insulated container till half of it vaporizes. Which of the following graphs show the temperature changes during this time?
  • A
  • B
  • C
  • ✓
Answer
Correct option: D.

The first time when temperature is constant represents change of state from solid to liquid and the second time temperature is constant represents change of state from liquid to vapour.
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MCQ 21 Mark
A solid is heated at a constant rate in an insulated container till half of it
vapourises. Which graph in the following fig shows the temperature changes during this time?
  • A
  • B
  • C
  • ✓
Answer
Correct option: D.

The first time when temperature is constant represents change of state from solid to liquid and the second time temperature is constant represents change of state from liquid to vapour.
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MCQ 31 Mark
What change in heat energy occurs when lead at its melting point
solidifies without change in the temperature?
  • ✓
    Latent heat is emitted
  • B
    Latent heat is absorbed
  • C
    Specific heat capacity is emitted
  • D
    Specific heat capacity is absorted
Answer
Correct option: A.
Latent heat is emitted
Latent heat is emitted.
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MCQ 41 Mark
A substance is heated at a constant rate from a low temperature to a high
temperature. A graph of temperature against time is drawn and is shown in
fig. . Which part of parts of the graph corresponds to the substance existing
in two states?
  • A
    All of it
  • B
    OA , BC , and DE
  • ✓
    AB and CD
  • D
    DE
Answer
Correct option: C.
AB and CD
AB and CD
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MCQ 51 Mark
2000 J of heat energy is required to raise the temperature of 4 kg of a metal by 3°c. Which expression gives the specific heat capacity of the metal?
  • ✓
    $2000 /(4 \times 3) \mathrm{J} / \mathrm{kg}^{\circ} \mathrm{C}$
  • B
    $\frac{2000}{4} \times 4 \mathrm{jjkg}^{\circ} \mathrm{C}$
  • C
    $2000 \times \frac{4}{3} \mathrm{~J} / \mathrm{kg}^{\circ} \mathrm{C}$
  • D
    $4 \times \frac{3}{2000} \mathrm{~J} / \mathrm{kg}^{\circ} \mathrm{C}$
Answer
Correct option: A.
$2000 /(4 \times 3) \mathrm{J} / \mathrm{kg}^{\circ} \mathrm{C}$
$2000 /(4 \times 3) \mathrm{J} / \mathrm{kg}^{\circ} \mathrm{C}$
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MCQ 61 Mark
Make the correct choice in each of the following:
(a) In what unit is the specific heat capacity expressed?
  • ✓
    $\mathrm{J} / \mathrm{kg}^{\circ} \mathrm{C}$
  • B
    $\mathrm{J} / \mathrm{kg}$
  • C
    $\mathrm{kg} / J^{\circ} \mathrm{C}$
  • D
    $\mathrm{kg} / \mathrm{J}$
Answer
Correct option: A.
$\mathrm{J} / \mathrm{kg}^{\circ} \mathrm{C}$
$\mathrm{J} / \mathrm{kg}^{\circ} \mathrm{C}$
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