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प्रश्न
Explain, why are soft drink bottles not completely filled?
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उत्तर
On lowering the temperature below 4°C, water expands due to its anomalous behaviour. So, if soft drink bottles are completely filled, then they may burst and cause accident. As a result, soft drink bottles are not completely filled.
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संबंधित प्रश्न
Explain the following:
How can you relate the formation of water droplets on the outer surface of a bottle taken out of refrigerator with formation of dew?
Explain the following:
In cold regions in winter, the rocks crack due to anomalous expansion of water.
Calculate the time required to heat 20 kg of water from 10°C to 35°C using an immersion heater rated 1000 W. Assume that 80% of the power input is used to heat the water. Specific heat capacity of water = 42000 J kg−1 K−1.
Draw a graph to show the variation in density of water with temperature in the range from 0°C to 10°C.
Describe an experiment to show that water has maximum density at 4°C. What important consequences follow this peculiar property of water? Discuss the importance of this phenomenon in nature.
Study the following diagrams and write down your observations.
Draw a neat and labelled diagram of Hope’s apparatus.
Write a short note.
Anomalous behaviour of water
Match the columns:
| Column ‘A’ | Column ‘B’ |
| The density of water is maximum at | (a) 0°C |
| (b) 4°C | |
| (c) 100°C |
