Iron on heating contracts and then expands contracts e

Iron on heating contracts and then expands contracts e
| Iron ______ on heating.

A. contracts and then expands

B. contracts

C. expands

D. expands and then contracts

Please scroll down to see the correct answer and solution guide.

Right Answer is: C

SOLUTION

Heating can cause a change in the state of metals. Most of the metals expand on heating and contract on cooling. 
When iron is heated to a high temperature, it expands.

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