Changes in State

Q.

Give an example of a physical change?

Q. Baking of cake is a physical change.

1. True
2. False

Q.

Define matter. State three characteristics of matter. Can light be classified as matter? Give one reason.

Q.

Formation of clouds is a physical change. Justify. [2 MARKS]

Q.

Give an example for condensation

Q. On heating, the quantity of water in pan keeps on decreasing due to _______.

1. condensation
2. solidification
3. evaporation
4. melting

Q. In which of the following examples the change in state of a substance is observed?

1. Melting of chocolate
2. Boiling of water
3. Pouring of milk in tea
4. Cutting of vegetables

Q. Fill in the blanks:

(a) Water is a matter because it has and occupies.

Q.

The process in which matter converts from gaseous state to the liquid state is called as .

1. Evaporation

2. Condensation

3. Decantation

4. Sedimentation

Q. Melting, breaking and tearing are examples of ___

1. physical change
2. chemical change
3. both physical and chemical change
4. none of the above

Q. Q 1) what r d 3 actions that bring about changes in matter? Elucidate it with an example

Q.

Name the process during which a vapour changes into the liquid state.

Q.

Which of the following is the characteristic of matter?

1. Matter has mass

2. Matter occupies space

3. Matter is made of small particles

4. All of these

Q. In which of the following examples the change in state of a substance is observed?
(i) Melting of chocolate
(ii) Boiling of water
(iii) Cutting of vegetables
(iv) Pouring of milk in tea

Q.

The process of conversion of water into its vapour is called as ___ .

Q.

Explain matter.

Q. In which of the following examples the change in state of a substance is observed?
(i) Melting of chocolate
(ii) Boiling of water
(iii) Cutting of vegetables
(iv) Pouring of milk in tea

Q.

Which of the following are matter? Chair, air, love, smell, hate, almonds, thought, cold, cold drink, the smell of perfume.

Q. During a physical change the state and the composition of the substance change.

Q. Sweta placed a kettle filled with ice cubes on a burner and left it unattended for a long time. What could be the observation?

1. Ice cubes $\to$ Water $\to$ Water vapour
2. Ice cubes $\to$ Water vapour $\to$ Water
3. Water $\to$ Water vapour $\to$ Ice cubes
4. Water $\to$ Ice cubes $\to$ Water vapour

Q. In which of the following examples the change in state of a substance is observed?
(i) Melting of chocolate
(ii) Boiling of water
(iii) Cutting of vegetables
(iv) Pouring of milk in tea

Q.

BURSTING OF A INFLATENED BALLOON IS A CHAMICAL CHANGE OR PHYSICAL CHANGE? GIVE 2 REASONS.

Q.

DO YOU CONSIDER BURSTING OF AN INFLATENED BALLOON IS A CHEMICAL OR PHYSICAL CHANGE? GIVE TWO REASONS.

Q.

Ice + ____ $\to$ Liquid water

1. Ice
2. Heat

3. Salt

4. Sugar

Q. In which of the following examples the change in state of a substance is observed?
(i) Melting of chocolate
(ii) Boiling of water
(iii) Cutting of vegetables
(iv) Pouring of milk in tea