Last Updated:
Water shows anomalous expansion between 0 and 10 degrees C which is unique among common liquids. Option A is wrong. Continuous volume increase and density decrease is NORMAL thermal expansion behaviour. Water does NOT follow this pattern from 0 to 4 degrees C. From 0 to 4 degrees C water actually contracts which is opposite to normal expansion. Option B is CORRECT. The image states: जब पानी को 0°C से 10°C तक गर्म किया जाता है तो पानी के आयतन का मान पहले घटता है बाद में बढ़ता है. From 0 to 4 degrees C water CONTRACTS so volume decreases and density increases. At exactly 4 degrees C water reaches its maximum density of 1000 kg per cubic metre. From 4 to 10 degrees C water expands normally so volume increases and density decreases. This anomalous behaviour is due to hydrogen bonding. Below 4 degrees C the hexagonal ice-like hydrogen bond structure partially persists making water less efficiently packed. Above 4 degrees C normal thermal expansion dominates. Option C is wrong. Continuous decrease in volume means perpetual contraction which does not happen above 4 degrees C. Option D is wrong. Temperature change always causes some volume and density change in real liquids.
FAQ
Common questions and clear answers for this topic.
Heat is a form of energy that transfers between objects or systems due to a temperature difference, moving from a hotter body to a cooler one until thermal equilibrium is reached.
Copyright 2026 Exambodh - All rights reserved.
