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AIIMS 2004
Exam
AIIMS
Year
2004
Subject
Chemistry
Chapter
Classification of Elements and Periodicity in Properties

AIIMS 2004 · Chemistry · Classification of Elements and Periodicity in Properties

For electron affinity of halogens which of the following is correct?

For electron affinity of halogens which of the following is correct?

Options

  1. ABr>F\mathrm{Br}>\mathrm{F}
  2. BF>Cl\mathrm{F}>\mathrm{Cl}
  3. CBr>Cl\mathrm{Br}>\mathrm{Cl}
  4. DF >> I

Correct answer

D. F >> I

Step-by-step solution

 FClBrI Electron affinity −3.6−3.8−3.5−3.2\begin{array}{lcccl}\text{ } & \mathrm{F} & \mathrm{Cl} & \mathrm{Br} & \mathrm{I} \\ \text{ Electron affinity } & -3.6 & -3.8 & -3.5 & -3.2\end{array}The low value of electron affinity of fluorine is probably due to small size of fluorine atom, i.e. electron density is high which hinders the addition of an extra electron.$
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