Question

Water at $4 ^\circ \,C$ is filled to the brim of 2 beakers. A boy perfomed an experiment 'A' of heating and 'B' of cooling. The observation was

• A. Water level in 'B' went down and in 'A' water flowed out:
• B. Water flowed out in both the cases
• C. Water flowed out in 'B' and water level went down in 'A'
• D. Water level went down in both cases

Answer 1

Answer: (B)

Water flowed out in both the cases

Answer 2

Water has anomalous expansion from $4^{0} C$ to $0^{\circ} C$. Water expands when heated from $4^{0} C$ onwards. Since water expands in both the cases, it will overflow from both experiments A and B.