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JEE MainChemistryp Block Elements (Group 15, 16, 17 & 18)

Which of the following statements regarding the halogens is INCORRECT?

Options

  1. AF₂ is a stronger oxidising agent than Cl₂ primarily because fluorine has a more negative electron gain enthalp
  2. BCl₂ can displace bromide and iodide ions from their respective aqueous solutions.
  3. CThe oxidising power of halogens decreases down the group in the order F₂ > Cl₂ > Br₂ > I₂ .
  4. DI₂ cannot displace chloride ions from an aqueous solution of NaCl .

Correct answer

A. F₂ is a stronger oxidising agent than Cl₂ primarily because fluorine has a more negative electron gain enthalp

Step-by-step solution

Statement 1 is incorrect. Fluorine ( F ) actually has a less negative electron gain enthalpy than chlorine ( Cl ) due to its small size and strong interelectronic repulsions. The stronger oxidising power of F₂ compared to Cl₂ is primarily due to its low bond dissociation enthalpy and the very high hydration enthalpy of the small fluoride ion ( F^- ). Statement 2 is correct. Chlorine is a stronger oxidising agent than bromine and iodine, so it displaces them from their aqueous halide solutions (which forms the basis

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