Solved MCQs With Verified Answers (Unit-8: Thermal Properties of Matter ) Physics SSC - I (Class 9)

i. Water freezes at

(a) 0° F
(b) 32° F
(c) -273 K
(d) 0 K

... Answer is (b)  32° F
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ii. Normal human body temperature is

(a) 15°C
(b) 37°C
(c) 37°F
(d) Lead

... Answer is (b)  37°C
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iii. Mercury is used as thermometric material because it has

(a) uniform thermal expansion
(b) low freeing point
(c) small heat capacity
(d) all the above properties

... Answer is (d) all the above properties
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iv. Which of the following material has large specific heat?

(a) copper
(b) Ice
(c) Water
(d) Mercury

... Answer is (c) Water
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v. Which of the following material has a large value of temperature coefficient of expansion?

(a) aluminum
(b) gold
(c) brass
(d) steel

... Answer is (a) aluminum
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vi. What will be the value of β for a solid for which α has a value of 2 x 10^-5 K^-1

(a) 2 x 10^-5 K^-1
(b) 6 x 10^-5 K^-1
(c) 8 x 10^-15 K^-1
(d) 8 x 10^-5 K^-1

... Answer is (b) 6 x 10^-5 K^-1
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vii. A large water reservoir keeps the temperature of nearby land due to :

(a) low temperature of the water
(b) low specific heat of water
(c) less absorption of heat
(d) large specific heat of water

... Answer is (d) large specific heat of water
-----

viii. Which of the following affects evaporation?

(a) Temperature
(b) surface area of the liquid
(c) Wind
(d) all of the above

... Answer is (c)  all of the above
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Unit-8: Thermal Properties of Matter

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Unit 7 ⇚  9th Physics Content List  ⇛   Unit 9

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