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प्रश्न
Chemical reactions are example for
विकल्प
reversible change
irreversible change
both of them
none of them
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उत्तर
Irreversible change
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संबंधित प्रश्न
Very Short Answer Type Question:
Give two examples of irreversible changes.
Short Answer Type Question:
What is a chemical change? Explain with example.
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 |
Circle the odd one.
Analogy
Dissolution of glucose : reversible change :: Digestion of food: ___________ change
Periodical removal of one of the products of a reversible reaction increases the yield.
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
Paheli had bought a new bottle of pickle from the market. She tried to open the metal cap to taste it but could not do so. She then took a bowl of hot water and immersed the upper end of the bottle in it for five minutes. She could easily open the bottle now. Can you give the reason for this?
Choose the odd one out. Give reason for your choice.
