Question

why are coils of electric toaster and electric iron made of an alloy rather than pure metal?​

Answer 1

Coils of electric toaster and electric iron made  of alloy because have more Melting point and boiling  point rather than pure metals.

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Answer 2

Explanation:

The resistivity of an alloy is higher than the pure metal. Moreover, at high temperatures, the alloys do not melt readily. Hence, the coils of heating appliances such as electric toasters and electric irons are made of an alloy rather than a pure metal.