Question

chpno.13 I.Choose the correct alternative :.

1. _______ is a useful change . 

options

Baking bread

Spoiling of milk

Greening of potatoes

Growth of fungus on bread

2. _____ is an example of irreversible change 

options

Wood into saw dust

Freezing water

Water changing to vapour

Melting of ice

3. The change due to which one substance is transformed into another substance having new and different properties is called a ______.

options

Physical change

Reversible Change

Non periodic change

Chemical change

4. The change in which the time interval is fixed is called _______change. 

options


Irreversible

Fast

Periodic

Slow
​

Answer 1

Answer:

3. Baking bread

4. Periodic

HOPE it HELPS you

Answer 2

Answer:

1- spoiling of milk

2- wood into saw dust

3-re versible chande

4-periodic