In which of the following pairs both members contain peroxy linkage?

which one of the following contains more number of peroxy linkages ?

Which of the following does not contain peroxy linkage?

Which of the following species have peroxide ion peroxy linkage ?

Which of the following oxy acids does not contain peroxy bond

Which of the following compounds does not have peroxy linkage?

Which of the following does not contain a peroxy bond

Which of the following pairs has both members form the same group?

The metal undergoing disproportionation are: Which of the following species have peroxide ion or peroxy linkage?