Chemistry - Complete P-block Question with Solution | TestHub

The nitrogen-containing compound (X) is dinitrogen pentoxide (N₂O₅), formed by the dehydration of nitric acid: $4HN{O}_3+P_4{O}_{10}\to 4HP{O}_3+2N_2{O}_5$.

Option B is correct: N₂O₅ contains no unpaired electrons, meaning it is entirely diamagnetic.

Option C is correct: It reacts with iodine (I₂) to produce iodine pentoxide (I₂O₅), which is widely used in analytical chemistry for the estimation of carbon monoxide (CO) gas.

Option D is correct: In its gas phase, N₂O₅ has a symmetrical structure (O₂N–O–NO₂) that contains an N–O–N (or X–O–X) linkage.