Select correct answers from the choices A, B, C, D which are given. Write down only the letter corresponding to the correct answer.
Which salt gives a brown precipitate with ammonium hydroxide ?

Options

A. A.iron (III) sulphate
B. B.iron (iii) chloride
C. C. iron (II) sulphate
D. D.iron (II) chloride

Answer

To solve the question "Which salt gives a brown precipitate with ammonium hydroxide?", we will analyze the possible salts that can react with ammonium hydroxide to form a brown precipitate.

### Step-by-Step Solution:

1. **Identify the relevant hydroxide formation**:
Ammonium hydroxide (NH4OH) reacts with certain metal salts to form metal hydroxides. In this case, we are looking for a metal hydroxide that produces a brown precipitate.

2. **Recognize the metal involved**:
The metal that typically forms a brown precipitate with ammonium hydroxide is iron (Fe). Specifically, iron(III) hydroxide (Fe(OH)3) is known to produce a brown precipitate.

3. **Consider the types of iron salts**:
Iron can exist in two oxidation states: iron(II) and iron(III).
- Iron(II) hydroxide (Fe(OH)2) forms a green precipitate, which is not what we are looking for.
- Iron(III) hydroxide (Fe(OH)3) forms a brown precipitate.

4. **Identify the salts that can produce iron(III) hydroxide**:
The salts that can provide iron(III) ions are:
- Iron(III) sulfate (Fe2(SO4)3)
- Iron(III) chloride (FeCl3)

5. **Write the reactions**:
- For iron(III) sulfate:
\[ Fe2(SO4)3 + 6NH4OH \rightarrow 2Fe(OH)3 \downarrow + 3(NH4)2SO4 \]
- For iron(III) chloride:
\[ FeCl3 + 3NH4OH \rightarrow Fe(OH)3 \downarrow + 3NH4Cl \]

6. **Conclusion**:
Both iron(III) sulfate and iron(III) chloride will give a brown precipitate of iron(III) hydroxide when reacted with ammonium hydroxide. Therefore, the correct answers are the salts that yield this precipitate.

### Final Answer:
The correct answers are A (Iron(III) sulfate) and B (Iron(III) chloride).