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3. Classification of elements and periodicity in properties — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry3. Classification of elements and periodicity in properties1 Mark
MCQ
Which of the following statements is correct?
  • A
    The magnitude of the second electron affinity of sulphur is greater than that of oxygen
  • ✓
    The magnitude of the second electron affinity of sulphur is less than that of oxygen
  • C
    The first electron affinities of bromine and iodine are approximately the same
  • D
    The first electron affinity of fluorine is greater than that of chlorine
✓

Answer

Correct option: B.
The magnitude of the second electron affinity of sulphur is less than that of oxygen
b
The magnitude of the second electron affinity of sulphur is less than that of oxygen, due to smaller size of oxygen.

The first electron affinity of chlorine is greater than that of fluorine and order of first electron affinity for halides is $Cl\, >\, F\, >\, Br \,> \,I$.

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