| (i) Carbon monoxide is neutral whereas\[S{{O}_{3}}\]is acidic |
| (ii) Potassium oxide is basic whereas nitrous oxide is acidic |
| (iii) Aluminium and zinc oxides are amphoteric |
| (iv) Sulphur trioxide is acidic whereas phosphorus pentoxide is basic |
| (v) Carbon dioxide is neutral whereas sulphur dioxide is amphoteric |
A) (ii) and (iii)
B) (i) and (iv)
C) (i) and (iii)
D) (ii) and (iv)
E) (iii) and (v)
Correct Answer: C
Solution :
(i) Carbon monoxide is neutral and\[S{{O}_{3}}\]is acidic. (ii) Aluminium and zinc oxides are amphoteric, so aluminium and zinc oxides react with both as acid and base. \[A{{l}_{2}}{{O}_{3}}+6HCl\to 2AlC{{l}_{3}}+3{{H}_{2}}O\](with acid) \[A{{l}_{2}}{{O}_{3}}+2NaOH+3{{H}_{2}}O\to 2NaAl{{(OH)}_{4}}\] (with base) \[ZnO+{{H}^{+}}\to Z{{n}^{2+}}+{{H}_{2}}O\] (in acid) \[ZnO+2O{{H}^{-}}+{{H}_{2}}O\to {{[Zn{{(OH)}_{4}}]}^{2-}}\](in base) Hence, (i) and (ii) are correct.
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