Bleaching powder is a salt of

Options

A. HCl
B. HOCl
C. HCl+HOCI
D. `HCl+HClO_(4)`

Answer

**Step-by-Step Solution:**

1. **Identify Bleaching Powder:**
- Bleaching powder is chemically represented as \( \text{Ca(OCl)}_2 \). It is commonly used in household products and for disinfection purposes.

2. **Determine the Composition of Bleaching Powder:**
- The formula \( \text{Ca(OCl)}_2 \) indicates that it consists of calcium ions (\( \text{Ca}^{2+} \)) and hypochlorite ions (\( \text{OCl}^- \)).

3. **Analyze the Given Options:**
- The options provided are:
- (a) HCl salt
- (b) HOCl salt
- (c) HCl plus HOCl salt
- (d) HCl plus HClO4 salt

4. **Examine Each Option:**
- **Option (a) HCl salt:**
- HCl dissociates into \( \text{H}^+ \) and \( \text{Cl}^- \). This does not provide the hypochlorite ion needed for bleaching powder.
- **Option (b) HOCl salt:**
- HOCl dissociates into \( \text{H}^+ \) and \( \text{OCl}^- \). While it provides the hypochlorite ion, it lacks the calcium ion.
- **Option (c) HCl plus HOCl salt:**
- HCl provides \( \text{Cl}^- \) and HOCl provides \( \text{OCl}^- \). Together, they can form \( \text{Ca(OCl)}_2 \) when combined with \( \text{Ca}^{2+} \).
- **Option (d) HCl plus HClO4 salt:**
- HCl provides \( \text{Cl}^- \) but HClO4 does not provide the hypochlorite ion, thus it cannot form bleaching powder.

5. **Conclusion:**
- The correct answer is option (c) HCl plus HOCl salt, as it provides the necessary ions to form bleaching powder.