Question

Give reasons:

Q1. Water pipes in colder countries often burst in winter.

Q2. A glass bottle completely filled with water & tightly closed at room temp., is likely to burst when kept in the freezer of a refrigerator.​

Answer 1

Answer:

1. On winter nights, as the atmospheric pressure starts falling below 4°C, water in the pipe lines expand and exert a great pressure on the pipes , causing them to burst
2. A glass bottle completely filled with water  and tightly closed at room temperature , is likely to burst when kept in the freezer of a refrigerator .This is due to anomalous expansion or strange behavior of water because most substances shrink when cooled, but water expands when it freezes.