Column II
Match the following
Column]
(a) Metals on heating
(b) Souring of milk
(c) Making clay toys
(d) Hot metal rim on cooling
(i) reversible change
expand
(iii) contracts
(iv) irreversible change
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Answer:
Metal expands when heated. ... Thermal expansion occurs because heat increases the vibrations of the atoms in the metal. Accounting for thermal expansion is essential when designing metallic structures.
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