CHEMISTRY [3 Mark Question Answer]

Rainwater harvesting has become important these days to conserve water. Water supply in urban area is getting short against the demand. Rainwater is collected and stored for use when water is scarce. Groundwater is getting depleted. Rainwater harvesting replenishes groundwater. It is also a good substitute to polluted water as rain in the purest form of natural water.

In severe winters, temperature reaches 0°C or below it. This causes water to freeze in water pipes. When water freezes, it expands and occupies larger space than liquid water because of anomalous expansion of water and exerts force on the pipes. As a result, the water pipes burst.