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NEETChemistryp Block Elements (Group 15, 16, 17 & 18)

Observe the following statements : I. Bleaching powder is used in the preparation of chloroform. II. Bleaching powder decomposes in the presence of CoCl ₂ to liberate O ₂ . III. Aqueous KHF ₂ is used in the preparation of fluorine. The correct combination is :

Options

  1. AI, II and III are correct
  2. BOnly II is correct
  3. COnly I and III are correct
  4. DOnly I and II are correct

Correct answer

D. Only I and II are correct

Step-by-step solution

Reaction of ethyl alcohol with bleaching powder to form chloroform takes place as - CH ₃ CH ₂ OH + Cl ₂ CH ₃ CHO +2 HCl CH ₃ CHO +3 Cl ₂ CCl ₃ CHO +3 HCl 2 CCl ₃ CHO + Ca ( OH )₂ 2 CHCl ₃+( HCOO )₂ Ca

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