Multiple choice

Which of the following statements are correct about halogens?

  1. Fluorine is a stronger oxidising agent than chlorine.
  2. Halogens have maximum negative electron gain enthalpy in the corresponding periods.
  3. The negative electron gain enthalpy of fluorine is more than that of chlorine.
  4. The enthalpy of dissociation of F2 is more than Cl2.

  1. 1 and 2

  2. 1 and 4

  3. 2 and 3

  4. 2 and 4

  5. 3 and 4
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A Correct answer
Explanation

Although electron gain enthalpy of fluorine is less negative as compared to chlorine, fluorine is a stronger oxidising agent than chlorine. It is due to low enthalpy of dissociation of F-F bond and high hydration enthalpy of F-. Halogens have maximum negative electron gain enthalpy in the corresponding periods. This is because after gaining an electron, they attain the stable noble gas configuration. Thus, this option is correct.

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