Question

Which has peroxy linkage?
(a) Perchloric acid
(b) Hypochlorous acid
(c) Para perchloric acid
(d) none of these

Answer 1

Hint:. Peroxy linkage is the linkage of the two oxygen atoms i.e. they are the oxygen-oxygen linkages and the compounds having such linkages are called the peroxy compounds. Now you can easily identify the compound with peroxy linkage.

Complete step by step answer:
First of all, let’s discuss what is peroxy linkage. By the peroxy linkage we mean that the compound consists of the -O-O- bond in it i.e. it has oxygen -oxygen linkage in it .
This peroxy linkage is very weak and results into the reactive free radicals when they undergo homolytic cleavage (the cleavage in which each atom receives one electron by the breaking of the covalent bond and results in the formation of the free radical is called s the homolytic cleavage).
Now considering the given options one by one as;
(a) Perchloric acid:- The formula of perchloric acid is $HCl{{O}_{4}}$ and its structure is as:
                       

So, from its structure it is clear that it doesn’t consist of peroxy linkage.

(b) Hypochlorous acid:- The formula of hypochlorous acid is $H Cl O$ and its structure is as;
                   

So, from its structure it is clear that it also doesn’t consist of peroxy linkage.

(c) Para perchloric acid:- The formula and structure of par perchloric acid is the same as that of the perchloric acid and has the same structure.
So, it also doesn’t consist of peroxy linkage.
Hence, neither of the above-mentioned compounds consists of the peroxy linkage.
So, the correct answer is “Option D”.

Note: Peroxy compounds are used in the process of polymerization and as well as in the addition reactions in the form of free radicals and they are also used as disinfectants, for bleaching purposes and in the manufacture of organic compounds like phenol through the cumene hyperoxide etc.