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Heat (Set - I)

Heat (Set - I)

15 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

In liquids and gases, the heat is transferred because of

  1. conduction
  2. convection
  3. radiation
  4. insulation
Question 2 Multiple Choice (Single Answer)

Uday dipped a plastic spoon in a cup of ice-cream. He observed that the spoon did not become cold. Which of the following is the correct reason of his observation?

  1. Heat transfers from spoon to ice-cream.
  2. Heat transfers from ice-cream to spoon.
  3. No heat transfer takes place between the spoon and ice-cream.
  4. Plastic spoon is a good conductor of heat.
Question 3 Multiple Choice (Single Answer)

Which of the following is the most reliable measure of the hotness of an object?

  1. Our sense of touch
  2. Temperature
  3. Physical state of an object
  4. Density
Question 4 Multiple Choice (Single Answer)

Which of the following objects are “hot”?

(i) Wooden handle of a frying pan being used for frying
(ii) Iced tea in a beaker
(iii) A spoon in a cup of hot milk
(iv) Ice cream
(v) Glowing light bulb

  1. Only (i), (iii)<font size="2"> and</font> (iv)
  2. Only (ii) and (iii)
  3. Only (iii) and (v)
  4. Only (i), (ii) and (iv)
Question 5 Multiple Choice (Single Answer)

Which of the following statements is/are not true?

  1. A clinical thermometer reads temperature from – 10°C to 110°C.
  2. The range of a laboratory thermometer is generally from 35° to 42°C.
  3. The thermometer that measures our body temperature is called a clinical thermometer.
  4. Both (1) and (2)
Question 6 Multiple Choice (Single Answer)

Which of the following thermometers can be used to measure the temperature of boiling water?

  1. Clinical thermometer
  2. Laboratory thermometer
  3. Maximum<font size="2">-</font>minimum thermometer
  4. Only (1) and (2)
Question 7 Multiple Choice (Single Answer)

Which of the following is an incorrect way of reading a clinical thermometer?

  1. We should hold the thermometer by the bulb while reading it.
  2. We should ensure that before use, the mercury level is below 35°C.
  3. We should wash the thermometer, preferably with an antiseptic solution before use.
  4. We should read the thermometer keeping the level of mercury along the line of sight.
Question 8 Multiple Choice (Single Answer)

Which of the following is a limitation of clinical thermometer?

  1. It cannot measure the temperature of the human body correctly.
  2. It is very difficult to read a clinical thermometer.
  3. It cannot be used to measure the temperatures above 42°C.
  4. There is no limitation of clinical thermometer.
Question 9 Multiple Choice (Single Answer)

Sea breeze blows during

  1. night
  2. day
  3. summers
  4. winters
Question 10 Multiple Choice (Single Answer)

What is the normal temperature of the human body?

  1. 35°C
  2. 37°C
  3. 42°C
  4. 98.6°C
Question 11 Multiple Choice (Single Answer)

Why is it preferred to wear light coloured clothes during summer?

  1. Light coloured clothes reflect most of the heat that falls on them.
  2. Light coloured clothes absorb the heat that falls on them.
  3. Light coloured clothes have air trapped in between their fibers.
  4. Light coloured clothes are poor conductors of heat.
Question 12 Multiple Choice (Single Answer)

When we go out with an umbrella in the sun, which of the following options holds good?

  1. The umbrella allows all the heat falling on it to pass through it.
  2. The umbrella reflects back all the heat falling on it.
  3. The umbrella absorbs all the heat falling on it.
  4. A part of the heat falling on the umbrella is reflected, part of it is absorbed and the rest is transmitted.
Question 13 Multiple Choice (Single Answer)

Conduction is a process by which

  1. heat is transferred from the hotter end to the colder end of an object
  2. heat is transferred from the colder end to the hotter end of an object
  3. heat is not transferred between the two ends of an object
  4. heat is radiated by all hot bodies
Question 14 Multiple Choice (Single Answer)

Why is it preferred to wear woollen clothes during winter?

  1. Because wool is a poor conductor of heat.
  2. Because wool is a good conductor of heat.
  3. Because it allows the sweat to evaporate.
  4. Because no air gets trapped in between the wool fibres.
Question 15 Multiple Choice (Single Answer)

Which of the following statements is not true?

  1. All the hot bodies radiate heat.
  2. The transfer of heat by radiation requires a medium.
  3. The temperature of an object increases due to the absorption of heat by the object.
  4. From the sun, the heat reaches us by the process known as radiation.
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