The interhalogen which does not exist is: — p Block Elements Chemistry Question

💡 Solution & Explanation

Step 1: Neutral interhalogen compounds always have formulas of the type XX'_n, where n is an odd integer (1, 3, 5, or 7) because both halogens have 7 valence electrons. Step 2: Consequently, compounds with an even number of halogens like ICl4 cannot exist as stable neutral molecules, as they would have an odd number of total valence electrons (an unpaired electron). Step 3: Therefore, the interhalogen which does not exist is ICl4, matching option (d).