Advertisements
Advertisements
प्रश्न
A drawing sheet changes when you draw a picture on it. Can you reverse this change?
Advertisements
उत्तर
If we draw a picture on a drawing sheet with a pencil, we can get back the original drawing sheet by erasing the drawing with an eraser. In this case, the change can be reversed.
However, if we draw with a pen, then the original drawing sheet cannot be obtained back because we cannot erase ink. Hence, in this case, the change cannot be reversed.
संबंधित प्रश्न
Very Short Answer Type Question:
Can you say deforestation is an irreversible or reversible change?
Circle the odd one.
To walk through a waterlogged area, you usually shorten the length of your dress by folding it. Can this change be reversed?
Evaporation of water is a reversible change.
Differences between
reversible and irreversible changes are:
The blackening of the Silver anklet is a (an) ______.
A piece of iron is heated till it becomes red-hot. it then becomes soft and is beaten to a desired shape. What kind of changes are observed in this process-reversible or irreversible?
Give one example of change which occurs on mixing two substances, but cannot be reversed.
Change of a bud into a flower is a change which cannot be reversed. Give four more such example.
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.
