See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

Be and Al forms BeO and Al2O3 on their surface, on reaction with conc. HNO3. BeCl2 forms polymer while AlCl3 forms dimer. BeO and Al2O3 reacts with acid as well as with base. BeCl2 and AlCl3 both are electron deficient and have vacant orbital in valency shell.