Which of the following is not a peroxy acid?

Which of the following does not have peroxy linkage.

Which of the following acids has a peroxy linkage?

Which of the following acids has a peroxy linkage?

Which of the following acids contain peroxy linkage ? I. Oleum II. Marshall's acid III. Caro's acid IV. Sulphuric acid

Which of the following is a pair of peroxy compounds?

Which of the following is a pair of peroxy compounds?

Which of the following do not have a peroxy linkage? (P) O_(2)F_(2) (Q) Perxenic acid (R) Perchloric acid (S) Pernitric acid

Which of the following acids is hydroxy acid ?