Heat English Medium Free Online Test 1 Mark Questions with Answer Key 2020 - 2021

9th Standard

    Reg.No. :
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Science

Time : 00:10:00 Hrs
Total Marks : 10

    Part A

    10 x 1 = 10
  1. Calorie is the unit of

    (a)

    heat

    (b)

    work

    (c)

    temperature

    (d)

    food

  2. The specific heat capacity of water is

    (a)

    4200 Jkg-1K-1

    (b)

    420 Jg-1K-1

    (c)

    0.42 Jg-1K-1

    (d)

    4.2 Jkg-1K-1

  3. Two cylindrical rods of same length have the area of cross section in the ratio 2:1. If both the rods are made up of same material, which of them conduct heat faster?

    (a)

    Both rods

    (b)

    Rod-2

    (c)

    Rod-1

    (d)

    None of them

  4. Two cylinders of equal height and radius are made of copper and aluminium. Which of them conducts heat faster?

    (a)

    Copper rod

    (b)

    Aluminium rod

    (c)

    Both of them

    (d)

    None of them

  5. A device in which the loss of heat due to conduction, convection and radiation is minimized is

    (a)

    Solar cell

    (b)

    Solar cooker

    (c)

    Thermometer

    (d)

    Thermos flask

  6. Water is used as a coolant because it________

    (a)

    is inexpensive

    (b)

    is easily available

    (c)

    is a good conductor of heat

    (d)

    has a high specific heat capacity

  7. The temperature at which a liquid gets converted into its vapour state is called its________

    (a)

    melting point

    (b)

    boiling point

    (c)

    dew point

    (d)

    freezing point

  8. Which of the following is true?

    (a)

    1 J = 412 calorie

    (b)

    1 J = 0.24 calorie

    (c)

    1 calorie = 4.2 J

    (d)

    Both band c

  9. Which one of the following scales has lower fixed point at 0°C?

    (a)

    Kelvin scale

    (b)

    Fahrenheit scale

    (c)

    Celsius scale

    (d)

    All of these

  10. In which of the following, chemical energy is converted into heat energy?

    (a)

    Heater

    (b)

    Refrigerators

    (c)

    Candle

    (d)

    Motor

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