Question

In the electric equipment producing heat e.g. iron, electric hea
toaster etc., an alloy such as Nichrome is used, not pure
metals.
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Answer 1

Because alloys are made up of two or more metals or non metals. Thus they have high resistance to conduct heat. Nichrome is also a alloy that's why it is used.

Answer 2

Answer:

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.