Question

Hydrogen sulphide gas turns lead acetate paper black.
A.True.
B.False

Answer 1

Lead acetate paper strips are used for the detection of hydrogen sulphide produced by the microorganism. The lead acetate procedure is more sensitive as compared to other procedures used for the detection of hydrogen sulphide..

Complete step by step answer:
As we know hydrogen sulphide gas is a colourless gas and when it reacts with lead acetate it produces lead sulphide and acetic acid. The chemical reaction for hydrogen sulphide with lead acetate is given as:
${H_2}S + {(C{H_3}COO)_2}Pb \to PbS \downarrow + 2C{H_3}COOH$
Here again, acetic acid is a colourless compound but lead sulphide forms a black precipitate which is indicated by the black coloured reaction on the lead acetate paper.
Hence we can say the given statement .i.e. hydrogen sulphide turns lead acetate paper black is true.

Additional information:
Hydrogen sulphide gas has a characteristic odour of rotten egg and it is a corrosive, poisonous and also flammable gas. Hydrogen gas is soluble in water as well as in alcohol. Hydrogen sulphide has been found in human brain, colon and intestine tissue. It can also be found in many food items such as naranjilla, peanuts and also in sweet orange. It is commonly known as hydrosulphuric acid, sewer gas and stink damp.

Note:
If we talk about the uses of hydrogen sulphide gas, it is primarily used for the production of sulphuric acid and sulphur gas. It is also used to create several inorganic sulphides which are used to manufacture pesticides, leather, dyes and pharmaceuticals. It is also used for the production of heavy water from the nuclear plant.