Ans.
1.
A few pieces of iron
sulphide are taken in a flat bottom flask fitted with a thistle funnel and a
delivery tube.
2.
The apparatus is arranged
as shown in the figure.
3.
Dilute HCl or dilute H2SO4
is added through the thistle funnel so that the lower end of the funnel dips
into the acid.
4.
The reaction takes place
instantly, and hydrogen sulphide (H2S) gas is evolved. It is then
collected in gas jar by the upward displacement of air.
