What is Marshall's acid?

Why HNO_3 Can’t be use for the preparation of H_2O_2 by BaO_2 ? What is Marshall acid?

Why syrapic H_3PO_4 is better Catalyst than H_2SO_4 for the dissociation of 2H_2O_2 f 2_H_2O + O_2 What is Marshall acid?

How many pi-bonds are present in Marshall's acid ?

How many pi-bonds are present in Marshall's acid ?

How many S-O bonds are present in Marshall's acid ?

Find the number of sigma bond and pi bonds present in Marshall's acid?

The oxidation state of sulphur in Marshall's acid is _______.

Which one is known as Marshall's acid ?