Reversible change

Q.

A sheet of paper is used to make a paper boat. This is a

1. Reversible change

2. Irreversible change

3. Reversible change and irreversible change

4. It is not a change

Q.

The growing of a moustache over a boy's face is a reversible change.

1. True

2. False

Q.

In any situation, a change can be

1. Reversible

2. Irreversible

3. Where there is no alteration in state

4. Both reversible and irreversible

Q.

Which among the following is an example of a reversible change?

1. Burning petrol

2. Making sand castle on beach

3. Cutting of trees

4. Making egg omelette

Q. Folding of paper is a change that can be undone.

1. True
2. False

Q.

A piece of paper is used to make a paper plane. This is a ___________ change.

1. permanent
2. reversible
3. irreversible
4. periodic

Q. What is the change taking place in the following processes ?

1. Irreversible, physical change
2. Reversible, chemical change
3. Reversible, physical change
4. Irreversible, chemical change

Q. An inflated balloon can be brought back to its original state.

1. False
2. True

Q. Which of the following is an example of reversible change?

1. Molding clay to form a toy
2. Making a light mark on a paper with a pencil
3. Cutting a piece of paper
4. Ripening of fruits

Q. If we suspend a weight using a spring, it stretches.

What kind of changes are involved in this?

1. Man-made
2. Reversible
3. Irreversible
4. Man-made and reversible as well