State two relevant observation
Ammonium hydroxide solution is added to zinc nitrate solution in minimum quantities and then in excess.

Explanation

To solve the question regarding the observations made when ammonium hydroxide (NH4OH) is added to zinc nitrate (Zn(NO3)2) solution in minimum quantities and then in excess, we can break it down into two steps:

### Step 1: Addition of Ammonium Hydroxide in Minimum Quantity
1. **Reaction**: When a small amount of ammonium hydroxide is added to zinc nitrate solution, a chemical reaction occurs:
\[ \text{Zn(NO}_3\text{)}_2 + 2 \text{NH}_4\text{OH} \rightarrow \text{Zn(OH)}_2 + 2 \text{NH}_4\text{NO}_3 \]
Here, zinc hydroxide (Zn(OH)2) is formed as a precipitate along with ammonium nitrate.
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