Which of the following statements is true for water when it is cooled from 4°C to 0°C?

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RRB NTPC - 2025

General Science

Which of the following statements is true for water when it is cooled from 4°C to 0°C?

This question was previously asked in

RRB NTPC 2025 Graduate CBT 2 Question Paper PDF (10-Jul-2026) (Shift 1)

Volume and density both increase

Volume and density both decrease

Volume increases but density decreases

Volume decreases but density remains same

The correct answer is

Volume increases but density decreases

Water shows anomalous expansion between 4°C and 0°C: as it cools in this range, its volume increases while its density decreases (reaching maximum density at 4°C).

The other combinations of volume and density change do not correctly describe this anomalous behaviour of water.

Hence, 'Volume increases but density decreases' is the correct answer.

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