NEETChemistryd and f Block Elements
Match List I with List II: List I (Oxide) List II (Property / Reaction) A. MnO I. Acidic oxide B. V ₂ O ₄ II. Basic oxide C. V ₂ O ₅ III. Dissolves in acids to give VO ²⁺ salts D. CrO ₃ IV. Dissolves in alkalies to give VO ₄³⁻ salts Choose the correct answer from the options given below:
Options
- AA-I, B-IV, C-III, D-II
- BA-II, B-III, C-IV, D-I
- CA-II, B-IV, C-III, D-I
- DA-I, B-III, C-IV, D-II
Correct answer
B. A-II, B-III, C-IV, D-I
Step-by-step solution
In transition metal oxides, lower oxidation states are generally basic, while higher oxidation states are acidic. MnO has manganese in the +2 oxidation state and is a basic oxide. CrO ₃ has chromium in the +6 oxidation state and is an acidic oxide. V ₂ O ₄ is amphoteric and dissolves in acids to give VO ²⁺ salts. V ₂ O ₅ is also amphoteric but predominantly acidic, and it dissolves in alkalies to give VO ₄³⁻ salts. Therefore, the correct matching is A-II, B-III, C-IV, D-I. Answer: A-II, B-III, C-IV, D-I