Question

Iron fillings and sulphur powder are mixed together and divided into two parts 'A' and "B". Part B was heated and part 'A” was not heated. Both the parts were added with dilute hydrochloric acid. Name the gas evolved in each part and write a test for their contirmation,​

Answer 1

Explanation:

Solution

As part 'A' is heated, a compound FeS is formed by the reaction between iron filings and sulphur. When dilute HCl is added to part A, FeS will react with dil HCl to form

gas which has smell of rotten eggs and will turn lead acetate paper black. <br>

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<br> As part 'B' in not heated, so B is a mixture of iron fillings and sulphur powder. When dil, HCl is added to it, iron filings react with dill. HCl to form

which burns with a 'pop' sound if burning match stick is brought near it. <br>

.