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प्रश्न
Explain why do vegetables and fruits get damaged during severe frost?
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उत्तर
Vegetables and fruits get damaged during severe fruits because the water present in them on freezing expands and burst open the cell walls of cells.
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संबंधित प्रश्न
Give reasons:
Water pipes burst in severe winters.
A calorimeter contains 50 g of water at 50°C. The temperature falls to 45°C in 10 minutes. When the calorimeter contains 100 g of water at 50°C, it takes 18 minutes for the temperature to become 45°C. Find the water equivalent of the calorimeter.
In a region with a cold climate the aquatic animals can survive at 4 °C, because _______.
Write a short note.
Anomalous behaviour of water
Observe the given picture and answer the following questions.
- Which property do you understand in this picture?
- What is the temperature of the water at the surface?
- What is the temperature below the layer of ice on the surface?
Match the columns:
| Column ‘A’ | Column ‘B’ |
| The density of water is maximum at | (a) 0°C |
| (b) 4°C | |
| (c) 100°C |
A graph between the volume and temperature of water is shown. Explain the anomalous behaviour of water.
