Matter in our Surroundings

1.

Multiple Choice

30 sec

1 pt

The amount of heat which is used to change the state of matter not for increase the temperature is called

Latent heat

Specific heat

Heat capacity

None of the above.

2.

Multiple Choice

30 sec

1 pt

Which of the following will produce severe burns ?

Cold water

Hot water

Boiling water

Steam

3.

Multiple Choice

30 sec

1 pt

Ice floats on water because

it has higher density than water

it has lower density than water due to more volume

it is solid

it is low melting solid

4.

Multiple Choice

30 sec

1 pt

Latent heat of fusion is amount of

heat energy required to change 1 kg solid into liquid completely at its melting point.

heat energy required to convert 1 kg solid into liquid at room temperature

heat energy required to change 1 g of solid into liquid completely

heat energy required to change 1 kg of solid into liquid at any temperature.

5.

Multiple Choice

30 sec

1 pt

When heat is constantly supplied by a burner to boiling water, then the temperature of water during vapourisation

Rises very slowly

Rises rapidly until steam is produced

First rises and then becomes constant

Does not rise at all

6.

Multiple Choice

30 sec

1 pt

When water at 0°C freezes to form ice at the same temperature of 0°C, then it

Absorbs some heat

Releases some heat

Neither absorbs nor releases heat

Absorbs exactly 3.34 x 10⁵J/kg of heat

7.

Multiple Choice

30 sec

1 pt

A student heats a beaker containing ice and water. He measures the temperature of the content of the beaker as a function of time. Which of the following will correctly represent the result.

8.

Multiple Choice

30 sec

1 pt

In which form, do the water molecules have less kinetic

energy?

(a) Ice

(b) Water

(c) Steam

(d) All of them have equal kinetic energy

9.

Multiple Choice

30 sec

1 pt

Which of the following has highest kinetic energy?

(a) Particles of ice at 0 degree C

(b) Particles of water at 0 degree C

(c) Particles of water at 100 degree C

(d) Particles of steam at 100 degree C

10.

Multiple Choice

30 sec

1 pt

235K = _________°C

38

-20

20

-38

11.

Multiple Choice

30 sec

1 pt

At what temperature liquid water and steam co-exist?

At the melting point of ice

At the boiling point of water

At the freezing point of water

At the condensation point

12.

Multiple Choice

30 sec

1 pt

Melting point of ice is

273.16K

373.15K

100°C

250.18K

13.

Multiple Choice

30 sec

1 pt

The S.I unit of temperature is:

Celsius

Fahrenheit

Kelvin

None

14.

Multiple Choice

30 sec

1 pt

On converting 308 K, 329 K and 391 K to Celsius scale, the correct sequence of temperatures will be:

33°C, 56°C and 118°C

35°C, 56°C and 119°C

35°C, 56°C and 118°C

56°, 119°C and 35° C

15.

Multiple Choice

30 sec

1 pt

When water at 0°C freezes to form ice at the same temperature of 0°C, then it:

Absorbs some heat

Neither absorbs nor releases heat

Absorbs exactly 3.34 x 10⁵J/kg of heat

Releases some heat

16.

Multiple Choice

30 sec

1 pt

When a solid is heated it's particles begin to vibrate with energy

true

false

17.

Multiple Choice

30 sec

1 pt

Which of the following represented latent heat of fusion in PPT?

18.

Multiple Choice

30 sec

1 pt

Which of the following represented latent heat of vapourization in PPT?

19.

Multiple Choice

30 sec

1 pt

Latent heat of vapourisation is amount of

heat energy required to change 1 kg liquid into vapours completely at its melting point.

heat energy required to convert 1 kg solid into liquid at room temperature

heat energy required to change 1 kg liquid into vapours completely at its boiling point.

heat energy required to change 1 kg of solid into liquid at any temperature.

20.

Multiple Choice

30 sec

Ungraded

20. For you, individually do you get an any better understanding of topics with my animations?

Answer Honestly with a little thinking.

Yes

No

It actually confuses me even more.

I don't know.

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