Which of the following compound is most acidic? — Periodic Table and Periodicity Chemistry Question

💡 Solution & Explanation

Step 1: The acidic strength of non-metal oxides increases with the electronegativity and the oxidation state of the central atom. Step 2: Identify the oxidation states of the central atoms: Cl in Cl2O7 is +7, S in SO3 is +6, P in P4O10 is +5, and B in B2O3 is +3. Step 3: Chlorine is both the most electronegative central atom among these choices and is in its highest oxidation state (+7). Thus, Cl2O7 forms the strongest acid (perchloric acid) in water and is the most acidic oxide, matching option (a).