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The electron affinity of bromine atom is equal to the ............... of bromide ion.
  1. ionisation potential
  2. electron affinity
  3. effective nuclear charge
  4. electro negative

ionisation potential
electro negative
effective nuclear charge
electron affinity
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Electron affinity is nothing but adding of electron to an atom whereas IP is removal of electron. Hence, electron affinity of bromine is equal to the ionization potential of bromide ion.

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