Advertisements
Advertisements
प्रश्न
Paheli mixed flour and water and
- made a dough,
- rolled the dough to make a chapati,
- baked the chapati on a pan,
- 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.
Advertisements
उत्तर
- Making of dough from flour and water is an irreversible change.
- Rolling the dough to make a chapati is reversible change.
- Baking the rolled chapati on a pan is an irreversible change.
- Grinding of dried chapati in a grinder is an irreversible change.
APPEARS IN
संबंधित प्रश्न
Short Answer Type Question:
What happens when sugar is heated?
To walk through a waterlogged area, you usually shorten the length of your dress by folding it. Can this change be reversed?
What are irreversible changes?
Analogy:
Irreversible change: Making idly front batter.
Reversible change: ______.
Which of the following changes cannot be reversed?
- Blowing of a balloon
- Folding paper to make a toy aeroplane
- Rolling a ball of dough to make roti
- Baking cake in an oven
- Drying a wet cloth
- Making biogas from cow dung
- Burning of a candle
Give one example of change which occurs on heating but can be reversed.
Give one example of change which occurs on cooling but can be reversed.
Find the odd one out and give reason for your choice.
Find the odd one out. Give reason for your choice.
Choose the odd one out. Give reason for your choice.
