Change of State

Q.

Define matter

Q. Name any three man-made sources of water.

Q.

What happens to camphor when we heat it?

1. Converts to liquid

2. Converts to solid

3. Converts to gas

4. No effect

Q.

We can change state of matter by heating and cooling.

1. True

2. False

Q. Reverse of freezing process is called ______

1. boiling
2. melting
3. condensation
4. sublimation

Q.

_________is the gaseous state of water.

Q.

What is the physical state of water at 25°C?

Q.

___ is the process in which a solid directly changes to gas, without turning into liquid.

Q.

what is another name for dry ice

Q.

Ice can be converted into water by cooling.

1. True
2. False

Q.

……..can exist in all three states.

Q.

In the given image, ___ plays a major role in collecting salt from sea/ocean water.

Q.

Water changes into ice on freezing. Why?

Q.

25. Anything which occupies……… and has………….is called matter.

Q. Which water storage item is made from animal skin and does not lead to water evaporation?

1. Water bottle
2. Piau
3. Mashak
4. Pots

Q.

When water changes to ice, there is no change in movement of molecules.

1. True

2. False

Q.

To change the state of matter from liquid to gas, the thermal heat is:

1. Removed

2. Added

3. Both a and b

4. None of these

Q.

Which of the following is not a state of matter?

1. Mixture

2. Gas

3. Solid

4. Liquid

Q. Identify the objects that are flammable in nature.

1. Hand sanitiser
2. Ice cube
3. Glass bottle
4. Paper cup

Q.

What are the fumes that come out when water is added to dry ice called?

1. Gaseous oxygen

2. Steam

3. Gaseous nitrogen

4. Gaseous carbon dioxide

Q.

Define matter. Name its three states.

Q.

Ice can be converted into water by cooling.

1. True
2. False

Q. Which among the following objects is hot?

1. Boiling water
2. Candle
3. Wood
4. Plastic