Question

which of these substances does not follow the
ormal\ rule of thermal expansion and thermal contraction? water lead

Explanation:

Water has an unusual property. Most substances expand when heated and contract when cooled (thermal expansion and contraction). But water expands when it freezes (from \(0^{\circ}C\) to \(4^{\circ}C\), water shows a decrease in volume as it warms, which is opposite to the normal thermal expansion behavior for most substances in the liquid - solid phase change range). Lead, on the other hand, follows the normal rule of thermal expansion and contraction.

Answer:

water