Question

Paheli mixed flour and water and

1. made a dough,
2. rolled the dough to make a chapati,
3. baked the chapati on a pan,
4. dried the chapati and ground it in a grinder to make powder.

Identify the changes (i) to (iv) as the changes that can be reversed or that cannot be reversed.

Answer 1

1. Making of dough from flour and water is irreversible change.
2. Rolling the dough to make a chapati is reversible change.
3. Baking the rolled chapati on a pan is irreversible change.
4. Grinding of dried chapati in a grinder is irreversible change.