Question

A glass is full of water at $4^{0}C$ when it is (a) cooled (b) heated. Then, which one of the following is correct?

• A. water level decreases, increases
• B. water level increases, decreases
• C. water level decreases, decreases
• D. water over flow in both cases

Answer 1

Answer: (D)

water over flow in both cases

When heated above $4^0$C, volume will increase, hence it will overflow.
When cooled below $4^0$C, it also expands and volume increases( anomalous expansion) until $0^0$C.
Hence, in both cases it will overflow.