Question

Iron filings and sulphur were mixed together and divided into two parts, A and B. Part A was heated strongly while Part B was not heated. Dilute hydrochloric acid was added to both the Parts and evolution of gas was seen in both the cases. How will you identify the gases evolved?

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Answer 1

Explanation:

part A : If Fe & sulphur mixed together with heat,

Fe + S = FeS ...........( 1 ) ( When it was heated strongly)

Fe + 2 HCl = FeCl2 + H2S .........( 2 ).

part B : But in B part, Fe does not reacts with sulphur bcz it was not heated.