'X' gas is produced during the electrolysis of bribe. Then, ’ X ’ gas is used in dry slaked lime to produce $$CaOCl_2$$​. What is ’ X '?

Correct option is D

The correct answer is: (D) Chlorine

Explanation:

• During the electrolysis of brine (which is a solution of salt in water, typically sodium chloride, NaCl), the gas chlorine (Cl₂) is produced at the anode.
• When chlorine gas (Cl₂) is bubbled through slaked lime (Ca(OH)₂), it reacts to form calcium oxychloride (CaOCl₂), commonly known as bleaching powder.
• The reaction is as follows:

                                    $${Ca(OH)}_2 + \text{Cl}_2 \rightarrow \text{Ca(OCl)}_2 + \text{H}_2\text{O}$$

        Products Formed:

•  Chlorine (Cl₂) gas at the anode
• Hydrogen (H₂) gas at the cathode
• Sodium Hydroxide (NaOH) in solution

Information Booster:

• Brine Electrolysis Process is called the Chlor-Alkali Process, producing Chlorine (Cl₂), Hydrogen (H₂), and Sodium Hydroxide (NaOH).
• Uses of Chlorine (Cl₂):
  • Water purification
  • Production of PVC (Polyvinyl chloride)
  • Manufacture of bleaching powder (CaOCl₂)

• Incorrect because Sulphur is not produced during the electrolysis of brine.
• Sulphur is usually obtained from volcanic sources or refining processes like the Claus process in petroleum refineries.
• It does not react with slaked lime (Ca(OH)₂) to form bleaching powder.

• Partially correct but not the answer.
• Hydrogen gas (H₂) is indeed produced during the electrolysis of brine, but it forms at the cathode and does not react with slaked lime.
• Hydrogen is mainly used for making ammonia (NH₃) via the Haber process, and not for making bleaching powder (CaOCl₂).

• Incorrect because nitrogen gas is not involved in the electrolysis of brine.
• Nitrogen is usually obtained from the air (which is 78% nitrogen) by the fractional distillation of liquid air.
• It does not react with slaked lime (Ca(OH)₂) to produce bleaching powder.