Question

How many of the following are neutral oxides?
CO, NO, Na\(_2\)O, N\(_2\)O, Cl\(_2\)O\(_7\), Al\(_2\)O\(_3\), As\(_2\)O\(_3\)

• A. 4
• B. 5
• C. 3
• D. 2

Hint:

Neutral oxides: CO, NO, N\(_2\)O. These oxides don't form acids or bases with water.

Answer 1

The Correct Option is C

Neutral oxides do not exhibit acidic or basic behavior. The following are classified:
- CO (Carbon monoxide) → Neutral oxide
- NO (Nitric oxide) → Neutral oxide
- N\(_2\)O (Nitrous oxide) → Neutral oxide
- Na\(_2\)O → Basic oxide (alkali metal oxide)
- Cl\(_2\)O\(_7\) → Acidic oxide (non-metal oxide)
- Al\(_2\)O\(_3\) → Amphoteric oxide
- As\(_2\)O\(_3\) → Acidic oxide
Hence, 3 neutral oxides: CO, NO, N\(_2\)O

Answer 2

Step 1: Understand what neutral oxides are
Neutral oxides are oxides that neither show acidic nor basic behavior when they react with water. They do not form acidic or basic solutions and are generally formed by elements in their intermediate oxidation states.

Step 2: Analyze each oxide given
- CO (Carbon monoxide): It is a neutral oxide because it does not react with water to form an acid or base.
- NO (Nitric oxide): Also a neutral oxide; it does not react with water.
- Na\(_2\)O (Sodium oxide): Basic oxide as it reacts with water to form NaOH.
- N\(_2\)O (Nitrous oxide): Neutral oxide; it does not form acidic or basic solutions.
- Cl\(_2\)O\(_7\) (Dichlorine heptoxide): Acidic oxide; reacts with water to form perchloric acid.
- Al\(_2\)O\(_3\) (Aluminum oxide): Amphoteric oxide; reacts both with acids and bases.
- As\(_2\)O\(_3\) (Arsenic trioxide): Acidic oxide; reacts with water to form arsenious acid.

Step 3: Count the neutral oxides
The neutral oxides among the list are CO, NO, and N\(_2\)O, making a total of 3.

Step 4: Final Conclusion
Therefore, the number of neutral oxides in the given list is 3.