Bleaching of a fabric cloth is done using A and excess of chlorine is removed using B.A and B are :

Options

A. `CaOCl_(2), Na_(2)SO_(3)`
B. `Na_(2)S_(2)O_(3), CaOCl_(2)`
C. `CaCl_(2), Na_(2)S_(2)O_(3)`
D. `CaOCl_(2), Na_(2)S_(2)O_(3)`

Explanation

To solve the question regarding the bleaching of fabric cloth using substances A and B, we can break down the solution into clear steps:

### Step 1: Identify the Bleaching Agent (A)
The first part of the question asks for the substance used for bleaching fabric cloth. The common bleaching agent used in this context is Calcium Oxychloride, which is represented by the chemical formula \( \text{Ca(OCl)}_2 \).

### Step 2: Understand the Reaction Involved
When Calcium Oxychloride is used for bleaching, it reacts with water to produce Calcium Hydroxide and Chlorine gas:
\[ \text{Ca(OCl)}_2 + 2 \text{H}_2\text{O} \rightarrow \text{Ca(OH)}_2 + \text{Cl}_2 \]
This reaction indicates that the presence of water is necessary for the bleaching process.

### Step 3: Identify the Substance to Remove Excess Chlorine (B)
After bleaching, there is excess chlorine that needs to be removed. The substance commonly used to remove excess chlorine is Sodium Thiosulfate, which has the chemical formula \( \text{Na}_2\text{S}_2\text{O}_3 \).

### Step 4: Understand the Reaction of Sodium Thiosulfate with Chlorine
Sodium Thiosulfate reacts with the excess chlorine to form Sodium Bisulfate and Chloride ions:
\[ \text{Na}_2\text{S}_2\text{O}_3 + \text{Cl}_2 \rightarrow 2 \text{NaHSO}_4 + 2 \text{Cl} \]
This reaction helps in neutralizing the excess chlorine present after the bleaching process.

### Conclusion
From the above steps, we conclude that:
- A (the bleaching agent) is \( \text{Ca(OCl)}_2 \)
- B (the agent to remove excess chlorine) is \( \text{Na}_2\text{S}_2\text{O}_3 \)

### Final Answer
A = \( \text{Ca(OCl)}_2 \) and B = \( \text{Na}_2\text{S}_2\text{O}_3 \)

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