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Periodic Table and Periodicity question

2006 · Q105
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Periodic Table and Periodicity question

2006 · Q105

NEETChemistryPeriodic Table and PeriodicityMCQ+4 / −1
Which one of the following orders is not in accordance with the property stated against it?
  1. A
    F2 > Cl2 > Br2 > I2 : Bond dissociation energy
  2. B
    F2 > Cl2 > Br2 > I2 : Oxidising power
  3. C
    HI > HBr > HCl > HF : Acidic property in water
  4. D
    F2 > Cl2 > Br2 > I2 : Electronegativity.
View written solutionFree

Correct answer: A

Bond dissociation energy is kcal/mol of F - F, Cl - Cl, Br - Br and I - I are 38, 57, 45.5 and 35.6 respectively.

Bond dissociation energy of fluorine is less because of its small size and repulsion between electrons of two atoms.

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