Reversible Change

Q. When wax is burnt (in the form of a wax candle), then water and carbon dioxide are formed.This shows the "change in state" characteristic of reactions. State true or false.

1. True
2. False

Q. Melting of ice is a ___ (reversible change/ irreversible change).

Q. Which of the following changes indicate that a chemical change has not taken place?

1. Absorption or release of heat
2. No new substance is formed
3. Change in colour
4. Evolution of gas

Q.

Adding salt to water, to make a salt solution, is a ____ process.

1. irreversible

2. cannot say

3. reversible

4. slow

Q.

1. Few children were inflating balloons.
2. The baker was baking a cake.

Among the aforementioned observations, which are the examples of reversible change?

1. Only observation 2 is a reversible change.

2. Both observation 1 & observation 2 are not reversible changes.

3. Both observation 1 & observation 2 are reversible changes.

4. Only observation 1 is a reversible change.

Q. Bharath heated a closed vessel full of water. After some time he observed that the water started boiling. Later there was no water in the vessel.
This is a/an ___.

1. reversible change
2. chemical change
3. cannot be determined
4. irreversible change

Q.

The following figure shows what type of a change?

Freezing Cooling — Wl e 108 Heating Melting 

Q.

Which among the following is an example of irreversible change?

1. Making structures of sand on beach

2. Melting of ice

3. Cutting trees

4. Making paper planes

Q.

Following figure shows _____________________ change.

1. Reversible

2. Both change can happen

3. No change is happening

4. Irreversible