Question

The acid which has a peroxy linkage is

• A. sulphurous aci
• B. pyrosulphuric aci
• C. dithionic acid
• D. Caro- acid

Answer 1

Answer: (D)

Caro- acid

Answer 2

Peroxomonosulphuric acid, $H_2SO_5$ is also known as Caro's acid. It has peroxy linkage -O-O- which is confirmed by X-ray studies.