NEET UG CHEMISTRY MCQ: P-BLOCK ELEMENTS

Option C (7) is correct because iodine reacts with concentrated nitric acid to form iodic acid ($HIO_3$), where the oxidation state of iodine is +5. The question asks for the oxidation state of I in Y, where Y is $HIO_3$. The reaction is $I_2 + 10HNO_3 \rightarrow 2HIO_3 + 10NO_2 + 4H_2O$. Thus, Y is $HIO_3$ and the oxidation state of I is +5.