When water is heated from 0°C to 4°C, its density
remains constant.
increases.
decreases.
first increases then decreases to its original value.
Answer is Right!
Answer is Wrong!
This question was previously asked in
UPSC CDS-2 – 2022
Water exhibits anomalous expansion between 0°C and 4°C. Unlike most substances whose density decreases upon heating (as volume increases), water’s volume *decreases* when heated from 0°C to 4°C. Density is mass per unit volume (ρ = m/V). Since the mass remains constant and the volume decreases in this temperature range, the density of water increases.