Question

Sulphur reacts with hot aqueous potassium hydroxide $KOH$ to form
A.Sulphuric acid
B.Hydroxide
C.Sulphide
D.None of the above

Answer 1

Hint: To answer this question, you should recall the physical and chemical properties of Sulphur and how it reacts with potassium hydroxide. Sulphur undergoes reduction in this reaction.

Complete Step by step solution:
Sulphur is a nonmetallic chemical element belonging to the oxygen group. It reacts with all metals except gold and platinum, forming sulfides. Sulphur reacts with hot aqueous potassium hydroxide, KOH, to form sulphide and thiosulphate species.
The reaction can be represented as: \[{S_8}\left( s \right) + 6KOH\left( {aq} \right) \to 2{K_2}{S_3} + {K_2}{S_2}{O_3} + 3{H_2}O\left( l \right)\]

Therefore, the correct answer to this question is option C.

Note: The group 16 elements of modern periodic table consist of 5 elements oxygen, sulphur, selenium, tellurium and polonium. The elements in this group are also known as the chalcogens or the ore-forming elements because many elements can be extracted from the sulphide or oxide ores. Sulphur is found in the combined state as well as in the free state. A large amount of sulphur is found from the underground deposits of pure sulphur present in dome-like structures. You should know about the uses Of Sulphur. It plays a key role in the body and is necessary for the synthesis of some key proteins. While sulphur consumed naturally in food is important to the body, there is scant evidence that it is helpful to take sulphur supplements. Sulphur is an ingredient approved by the FDA for use in dandruff products of over-the-counter nature. It often comes in combination with salicylic acid. Osteoarthritis is often treated with the use of sulphur supplements.