Question

When potassium hydrogen sulphate is treated with fluorine, the product obtained
(A) potassium persulphate
(B) potassium sulphide
(C) potassium sulphite
(D) potassium thiosulphate

Answer 1

Hint: The molecular formula or IUPAC name of potassium hydrogen sulphate is \[KHS{O_4}\] . It is white in colour, water soluble and has been used in many organic preparations. It also acts as a good solid catalyst in the chemical reactions. It is inexpensive, highly reactive, eco friendly and easy to handle. Always take care of the valencies while balancing the reaction between potassium hydrogen sulphate with fluorine.

Complete step by step answer:
Fluorine is represented by symbol F in the periodic table and has atomic number 9. Fluorine (F) is the most reactive chemical element because of the property of electronegativity. It comes under the halogen family (Group 17) and it is the lightest member of this group.
When potassium hydrogen sulphate is treated with fluorine, the products obtained are potassium per sulfate and hydrogen fluoride .
\[2KHS{O_4} + {F_2} \to {K_2}{S_2}{O_8} + 2HF\]

So, the correct answer is Option A.

Additional information:
Potassium Sulphate –Formula of Potassium Sulphate is \[{K_2}S{O_4}\].
Features of Potassium Sulphate :
(1) It is a white crystalline solid .
(2) It does not form hydrates .
(3) When heated with carbon, it is reduced to potassium sulphide .
(4) It resembles \[N{a_2}S{O_4}\] .
Fluorine. It is mainly used for the manufacture of \[U{F_6}\] for nuclear power generation. It is also used for the preparation of many fluorinating agents. The important organic chemicals derived from HF are the chlorofluorocarbons and polytetrafluoroethylene (teflon).

Note: Halogen family - The non-metallic elements Fluorine (F), Chlorine (Cl), Bromine (Br), Iodine (I) and Astatine (At) are grouped together to form group 17 of the Periodic Table. Their salts are present in sea-water and hence they are collectively known as halogens (Greek, Halos means sea salt producers). The group collectively is called halogen family. All halogens precede the noble gases in the periodic table because their atoms contain one electron less than the electronic configuration of the inert gas. They have a very strong tendency to acquire stable inert gas configuration by accepting one electron. For this reason halogens exhibit non-metallic behaviour. Astatine, the last member of the halogen family is a radioactive element with a very short life. All other halogens are abundant in nature in the combined state.
Students remember that in order to find the product of an inorganic reaction first write a balanced chemical equation. Here it is important to remember the common compounds involving two elements.