Which of the following reaction(s) is/are incorrect for silver nitrate?

Options

A. `6AgNO_(3)+3l_(2)("excees")+3H_(2)OtoAglO_(3)+5Agl+6HNO_(3)`
B. `AgNO_(3)("excess")+2KCN toK[Ag(CN)_(2)]+KNO_(3)`
C. `2AgNO_(3)+4Na_(2)S_(2)O_(3)("excess")to2Na_(3)[Ag(S_(2)O_(3))_(2)]+2NaNO_(3)`
D. `PH_(3)+6AgNO_(3)+3H_(2)OtoAg+6HNO_(3)+H_(3)PO_(3)`

Explanation

To determine which reactions involving silver nitrate (AgNO3) are incorrect, we will analyze each reaction step by step.

### Step 1: Analyze the first reaction
**Reaction:** AgNO3 + I2 + H2O → AgIO3 + AgI + HNO3

**Analysis:**
- The expected products are AgIO3 and AgI. However, the correct product should be HIO3 instead of AgIO3.
- Therefore, the correct balanced reaction should be:
\[ 6 \text{AgNO}_3 + 3 \text{I}_2 + 3 \text{H}_2\text{O} \rightarrow 5 \text{AgI} + 5 \text{HNO}_3 + 3 \text{HIO}_3 \]
- **Conclusion:** This reaction is incorrect.

### Step 2: Analyze the second reaction
**Reaction:** AgNO3 + KCN → Complex + KNO3

**Analysis:**
- When AgNO3 is in excess, there is insufficient CN⁻ ions from KCN to form the complex.
- Instead, the reaction will produce AgCN as a white precipitate:
\[ \text{AgNO}_3 + \text{KCN} \rightarrow \text{AgCN} + \text{KNO}_3 \]
- **Conclusion:** This reaction is also incorrect.

### Step 3: Analyze the third reaction
**Reaction:** AgNO3 + Na2S2O3 → Complex + NaNO3

**Analysis:**
- In this case, sodium thiosulfate (Na2S2O3) is taken in excess, allowing for the formation of a complex with AgNO3.
- The reaction can be represented as:
\[ \text{AgNO}_3 + \text{Na}_2\text{S}_2\text{O}_3 \rightarrow \text{[Ag(S2O3)2]}^{3-} + \text{NaNO}_3 \]
- **Conclusion:** This reaction is correct.

### Step 4: Analyze the fourth reaction
**Reaction:** PH3 + AgNO3 + H2O → HNO3 + H3PO3 + Ag

**Analysis:**
- This is a redox reaction where silver (Ag) is reduced from +1 to 0, and phosphorus (P) is oxidized from -3 to +3.
- The balanced reaction can be represented as:
\[ 3 \text{AgNO}_3 + \text{PH}_3 + 3 \text{H}_2\text{O} \rightarrow 3 \text{HNO}_3 + \text{H}_3\text{PO}_3 + 3 \text{Ag} \]
- **Conclusion:** This reaction is correct.

### Final Conclusion
The incorrect reactions involving silver nitrate are:
1. AgNO3 + I2 + H2O → AgIO3 + AgI + HNO3
2. AgNO3 + KCN → Complex + KNO3