Heat Test

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Heat Test - 3

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Weekly Quiz Competition

Question 1
1 / -0

Convert the 300K temperature to Celsius scale.

A
573^oC

B
27^oC

C
1.09^oC

D
148.8^oC

Solution

SI unit of temperature is Kelvin.
T (K) = T (^oC) + 273

300K = (300 - 273)^oC = 27^oC
Question 2
1 / -0

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

A
We should hold the thermometer by the bulb while reading it.

B
We should ensure that before use, the mercury level is below 35°C.

C
We should wash the thermometer, preferably with an antiseptic solution before use.

D
We should read the thermometer keeping the level of mercury along the line of sight.

Solution

We should not hold the thermometer by its bulb while reading it. It would affect the temperature reading.
Question 3
1 / -0

Land and Sea breezes occur along coastal areas or areas with adjacent large water bodies. Water and land have different heating abilities. Water takes a bit more time to warm up and is able to retain the heat longer than land does. These breezes take place due to

A
convection

B
conduction

C
radiation

D
temperature

Solution

The motion of warm material that rises, cools off, and sinks again, producing a continuous circulation of material and transfer of heat is called convection. So, land breeze and sea breeze are caused by convection only.
Question 4
1 / -0

A student is doing some experiments in the chemistry lab. He goes to take the temperature of a liquid which is boiling in a beaker. While doing so, he checks the temperature of the boiling liquid by dipping a lab thermometer into it. Why does he not take the thermometer out of the liquid before reading the temperature?

A
The level of mercury begins to fall as soon as the lab thermometer is taken out.

B
The level of mercury rises when it is taken out.

C
He does it by mistake.

D
The method helps him to get the reading of desired temperature.

Solution

The level of mercury begins to fall as soon as the lab thermometer is taken out as the air around has lesser temperature.
Question 5
1 / -0

Which of the following options correctly classifies the objects listed below as conductors and insulators?

(i) Aluminium wire
(ii) Steel spoon
(iii) Wooden handle
(iv) Silver coin
(v) Plastic bottle
(vi) Blade of knife

A
Conductors: (i), (ii), (vi) Insulators: (iii), (iv), (v)

B
Conductors: (i), (ii) Insulators: (iii), (iv), (v), (vi)

C
Conductors: (i), (ii), (iv), (vi) Insulators: (iii), (v)

D
Conductors: (i), (ii), (iv) Insulators: (iii), (v), (vi)

Solution

Aluminium wire, steel spoon, silver coin, blade of knife allow heat to pass through them. Therefore, these are conductors.
Wooden handle and plastic bottle do not allow heat to pass through them. So, these are insulators.
Question 6
1 / -0

During severe winters, water in a lake starts freezing

A
first at the bottom

B
first at the surface

C
as a whole

D
first in the middle

Solution

The air is very cold above the surface of water. The heat from the surface of the water escapes to the environment. As a result, the temperature at the surface is lowered, whereas below the surface it is warmer.
Question 7
1 / -0

Which of the following statements is not true?

A
All hot bodies radiate heat.

B
The transfer of heat by radiation requires a medium.

C
The temperature of an object increases due to absorption of heat by the object.

D
The heat from sun reaches us by the process known as radiation.

Solution

The transfer of heat by radiation does not require any medium.
Question 8
1 / -0

Which of the following statements is/are false?

a. Maximum and minimum temperatures of the previous day, reported in weather reports are measured by a thermometer is called bimetallic thermometer.
b. A thermometer that is used by doctors to measure temperature of his patients is known as clinical thermometer.
c. The thermometer that consists of a very fine glass tube having a very small bore is called a capillary tube.

A
Only a

B
Only a and b

C
Only b

D
Only b and c

Solution

Maximum and minimum temperatures of the previous day, reported in weather reports, are measured by a thermometer is called maximum and minimum thermometer.
Question 9
1 / -0

Which of the following statements is/are false?

a. Conduction starts once the two objects or the parts of the same object have attained the same temperature.
b. Cooling coils of air conditioners are made of copper as they readily conduct away heat.
c. Heat energy does flows through bad conductors, but at a very small rate as compared to good conductors.

A
Only a

B
Only a and b

C
Only b

D
Only b and c

Solution

Once the two objects or the parts of the same object have attained the same temperature, conduction stops.

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Heat Test - 3

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Heat Test - 3

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SHARING IS CARING

Question 1

573oC

27oC

1.09oC

148.8oC

Solution

Question 2

We should hold the thermometer by the bulb while reading it.

We should ensure that before use, the mercury level is below 35°C.

We should wash the thermometer, preferably with an antiseptic solution before use.

We should read the thermometer keeping the level of mercury along the line of sight.

Solution

Question 3

convection

conduction

radiation

temperature

Solution

Question 4

The level of mercury begins to fall as soon as the lab thermometer is taken out.

The level of mercury rises when it is taken out.

He does it by mistake.

The method helps him to get the reading of desired temperature.

Solution

Question 5

Conductors: (i), (ii), (vi) Insulators: (iii), (iv), (v)

Conductors: (i), (ii) Insulators: (iii), (iv), (v), (vi)

Conductors: (i), (ii), (iv), (vi) Insulators: (iii), (v)

Conductors: (i), (ii), (iv) Insulators: (iii), (v), (vi)

Solution

Question 6

first at the bottom

first at the surface

as a whole

first in the middle

Solution

Question 7

All hot bodies radiate heat.

The transfer of heat by radiation requires a medium.

The temperature of an object increases due to absorption of heat by the object.

The heat from sun reaches us by the process known as radiation.

Solution

Question 8

Only a

Only a and b

Only b

Only b and c

Solution

Question 9

Only a

Only a and b

Only b

Only b and c

Solution

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573^oC

27^oC

1.09^oC

148.8^oC