Milk of sulphur finds its application in:

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Medicines

Photography

Head of match stick

Vulcanization

answer is A.

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Detailed Solution

Concept- Milk of sulphur or precipitated sulphur is defined as calcium sulphate. It can be obtained by adding an acid to a solution of calcium pentasulphide (

Ca S_{5}

).
It is prepared by boiling the milk of lime with sulphur, and then the calcium sulphide formed in this way is decomposed by

HCl

to form a white amorphous precipitate of sulphur.
Milk of sulphur is a non-crystalline solid and white in colour. It is soluble in carbon disulfide. At the moment of heating, it turns into the classic yellow assortment of sulphur, which is used as a part of medicines. It is majorly used in the treatment of various skin diseases.
Therefore, it is used in medicines.
Hence, the correct answer is 1.

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