Question

when we heat mixture of sulphur powder and iron fillings,the first observation made is. a) sulphur melts b) iron filling starts melting c) mixture becomes red hot d) mixture evaporates

Answer 1

Explanation:

As its melting point is less than iron,it will melt first.

As it is a heterogeneous mixture of sulphur and iron,so both will retain their properties till compound is formed.And the compound is FeS (iron sulphide)