(i) Among halogens, radius ratio between iodine and fluorine is maximum.

(ii) Leaving F—F bond, all halogens have weaker X—X bond than X—X’ bond in interhalogens.

(iii) Among interhalogen compounds, the maximum number of atoms are present in iodine fluoride.

(iv) Interhalogen compounds are more reactive than halogen compounds.

Correct Answers: 

(i) Among halogens, radius ratio between iodine and fluorine is maximum.

(iii) Among interhalogen compounds, the maximum number of atoms are present in iodine fluoride.

(iv) Interhalogen compounds are more reactive than halogen compounds.

Explanation: Leaving F—F bond, all halogens have stronger X—X bond than X—X’ bond in interhalogens.