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प्रश्न
Give one example of change which occurs on mixing two substances, but cannot be reversed.
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उत्तर
Mixing of cement and water is an irreversible change.
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संबंधित प्रश्न
Short Answer Type Question:
What is a physical change? Explain with example.
Differentiate reversible and irreversible changes.
A drawing sheet changes when you draw a picture on it. Can you reverse this change?
What are reversible 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 cooling but can be reversed.
Change of a bud into a flower is a change which cannot be reversed. Give four more such example.
Choose the odd one out. Give reason for your choice.
Choose the odd one out. Give reason for your choice.
