Heat Test

Result

Heat Test - 6

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Water is used in hot water bottles because

A
its specific heat is high

B
it is easy to heat

C
it is easily available

D
it is not harmful to health

Solution

Water is used in hot water bottles because its specific heat is very high.
Question 2
1 / -0

The water equivalent of a body is 10 g. Its thermal capacity is

A
10 J/K

B
10 Cal/K

C
10 K Cal/K

D
10 g/K

Solution

The water equivalent of a body is 10 g. Its thermal capacity is 10 Cal/K
Question 3
1 / -0

During severe winter, 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

Water in the lake starts freezing at the surface because ice is less dense than water and hence rises to the surface.
Question 4
1 / -0

During melting process, heat given to a body is utilized in

A
increasing temperature

B
increasing density

C
increasing the average distance between molecules

D
decreasing the mass of the body

Solution

During melting process the heat supplied to a body is utilized in changing the phase of a body. As in melting, the body is changing from solid to liquid, and solid is more dense and liquid is less dense, therefore, the average distance between the molecules increases.
Question 5
1 / -0

One gram of ice at 0°C is converted into steam at 100°C. The amount of heat required to do so is(Latent heat of fusion of ice = 80 cal/ g)

A
80 cal

B
536 cal

C
616 cal

D
0.6439 kcal

Solution

Latent heat of fusion of ice = 80 cal/ g
Hence, from ice at 0°C to water at 0°C

Heat required = 80 cal

Heat required to increase the temperature of water from 0°C to 100°C
= 1 × 0.239 × 100
= 23.9 cal

Water now converts to steam at 100°C,
= 1 × 540
= 540 cal

Total = 80 + 23.9 + 540
= 643.9 cal
= 0.6439 kcal
Question 6
1 / -0

Which device can convert electrical energy into heat?

A
Radiator

B
Converter

C
Generator

D
Resistor

Solution

Resistor converts electrical energy into heat.
Question 7
1 / -0

The boiling point of water can be raised by

A
increasing heat supply

B
increasing quantity of water

C
increasing pressure

D
reduced pressure

Solution

Boiling point of water can be raised by increasing pressure because pressure is directly proportional to temperature.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Heat Test - 6

Result

Heat Test - 6

Score

-

Rank

-

SHARING IS CARING

Question 1

its specific heat is high

it is easy to heat

it is easily available

it is not harmful to health

Solution

Question 2

10 J/K

10 Cal/K

10 K Cal/K

10 g/K

Solution

Question 3

first at the bottom

first at the surface

as a whole

first in the middle

Solution

Question 4

increasing temperature

increasing density

increasing the average distance between molecules

decreasing the mass of the body

Solution

Question 5

80 cal

536 cal

616 cal

0.6439 kcal

Solution

Question 6

Radiator

Converter

Generator

Resistor

Solution

Question 7

increasing heat supply

increasing quantity of water

increasing pressure

reduced pressure

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.