Question

The acid which has a peroxy linkage is

• A. Sulphurous acid
• B. Pyrosulphuric acid
• C. Dithionic acid
• D. Caro’s acid

Answer 1

Answer: (D)

Caro’s acid is $H_{2}S{O}_5$ which contains one $S-O-O-H$ peroxy linkage. It is also known as permonosulphuric acids.