Heat Test

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Heat Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

Latent heat of fusion of ice is

A
80 k cal/gm

B
80 cal /kg

C
80 cal/gm

D
100 cal/gm
Question 2
1 / -0

The amount of heat required to convert a unit mass of a liquid at its boiling point to vapours at the same temperature is called

A
latent heat of fusion

B
thermal capacity

C
latent heat of vaporization

D
specific heat
Question 3
1 / -0

In a pressure cooker water boils at

A
nearly 100^oC

B
more than 100^oC

C
less than 100^oC

D
none of these
Question 4
1 / -0

Latent heat of vaporisation of water boiling under normal pressure is

A
470 cal/g

B
540 cal/g

C
580 cal/g

D
640 cal/g
Question 5
1 / -0

Calculate the quantity of heat given off by 100 gm of water, when it cools from 100^oC to 70^oC.

A
1 cal

B
2000 cal

C
3000 cal

D
None of these

Solution

H = M x S x ΔT = 100 g x 1 Cal/g. ^oC x 30 ^oC = 3000 ^oC.
Question 6
1 / -0

The amount of ice (at 0^oC) that can be melted by 4000 calories of heat (latent heat of fusion of ice is 80 cal/g) is

A
320 g

B
50 g

C
0.02 g

D
100 g
Question 7
1 / -0

Roughly speaking, liquids expand about _________ times more than solids.

A
50

B
2

C
10

D
100
Question 8
1 / -0

The temperature of a body is a measure of the

A
average kinetic energy of the molecules

B
total energy of the molecules

C
velocity of the molecules

D
average potential energy of the molecules
Question 9
1 / -0

The most commonly used thermometric substance is

A
water

B
alcohol

C
mercury

D
turpentine

Solution

Mercury is the most commonly used thermometric substance.
It is used because it has high melting and boiling points making it a liquid over a broad range of temperature. Since it is a metal, it has a stable coefficient of expansion; hence, it expands uniformly and noticeably for a slight change of temperature.
Question 10
1 / -0

Celsius scale divides two fixed points equally into

A
100 parts

B
180 parts

C
212 parts

D
32 parts

Solution

The Celsius scale is also known as the centigrade temperature scale. In the Celsius scale, the lower fixed point is taken as 0ºC and the upper fixed point is taken as 100ºC. The interval between 0ºC and 100ºC is called the fundamental interval. The fundamental interval is divided into 100 equal parts.

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Heat Test - 2

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Heat Test - 2

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SHARING IS CARING

Question 1

80 k cal/gm

80 cal /kg

80 cal/gm

100 cal/gm

Question 2

latent heat of fusion

thermal capacity

latent heat of vaporization

specific heat

Question 3

nearly 100oC

more than 100oC

less than 100oC

none of these

Question 4

470 cal/g

540 cal/g

580 cal/g

640 cal/g

Question 5

1 cal

2000 cal

3000 cal

None of these

Solution

Question 6

320 g

50 g

0.02 g

100 g

Question 7

50

2

10

100

Question 8

average kinetic energy of the molecules

total energy of the molecules

velocity of the molecules

average potential energy of the molecules

Question 9

water

alcohol

mercury

turpentine

Solution

Question 10

100 parts

180 parts

212 parts

32 parts

Solution

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nearly 100^oC

more than 100^oC

less than 100^oC