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Question
Chemical reactions are example for
Options
reversible change
irreversible change
both of them
none of them
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Solution
Irreversible change
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RELATED QUESTIONS
Match the following.
| Bud to flower | Dr. A.P.J. Abdul Kalam |
| Reversible change | Recyclable waste |
| India 2020 | Organic waste |
| Paper | Melting of ice |
| Vegetables | Irreversible change |
Give examples to explain the difference between changes that can or cannot be reversed.
Change is the ______ of a substance from one form to another.
Dissolving sugar in water is a ______ change.
What are irreversible changes?
Analogy:
Irreversible change: Making idly front batter.
Reversible change: ______.
While lighting a candle, Paheli observed the following changes.
- Wax was melting
- Candle was burning
- Size of the candle was reducing
- Melted wax was getting solidified.
Of the above, the changes that can be reversed are
Can we reverse the following change? If yes, suggest the name of the method.
Water into water vapour
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
Circle the odd one out. Give a reason for your choice.
