Multiple choice

Water pipes in hilly areas often burst on a cold frosty night, because

  1. the material in which pipes are made contracts due to cold and so it burst

  2. water in the pipes freezes and on freezing water expands, so pipes burst

  3. burst makes the pipes rusty, so they break

  4. None of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Water has a unique property where it expands when it freezes into ice, unlike most substances that contract. This expansion exerts immense pressure inside closed pipes on cold frosty nights, causing them to burst.