Question

Identify the pair of basic oxides from the following.

• A. \(\text{CaO}\) and \(\text{Na}_{2}\text{O}\)
• B. \(\text{SO}_{2}\) and \(\text{Cl}_{2}\text{O}\)
• C. \(\text{BaO}\) and \(\text{N}_{2}\text{O}_{5}\)
• D. \(\text{CO}\) and \(\text{N}_{2}\text{O}\)

Hint:

Oxides of metals are basic, while oxides of non-metals are acidic or neutral.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept
Oxides of electropositive metals such as Ca and Na are basic. Oxides of non-metals are acidic or neutral.

Step 2: Check each pair
CaO and \(\text{Na}_2\text{O}\): both metal oxides, so both are basic.
\(\text{SO}_2\) and \(\text{Cl}_2\text{O}\): both acidic.
BaO and \(\text{N}_2\text{O}_5\): BaO is basic but \(\text{N}_2\text{O}_5\) is acidic.
CO and \(\text{N}_2\text{O}\): both neutral.

Step 3: Result
Only the first pair has two basic oxides.

Final Answer:
The pair of basic oxides is CaO and Na2O, which is option (A). \[ \boxed{\text{(A) }\text{CaO and Na}_{2}\text{O}} \]