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STD 12 - 4. d and f- block elements — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 12 - 4. d and f- block elements4 Marks
MCQ
In a transition series, as the atomic number increases, paramagnetism
  • A
    increases gradually
  • B
    decreases gradually
  • ✓
    first increases to a maximum and then decreases
  • D
    first decreases to a minimum and then increases
✓

Answer

Correct option: C.
first increases to a maximum and then decreases
c
For transition elements, with increase in atomic number electrons enter the empty d-orbitals. First they are singly occupied which increases paramagnetism until the point where all the d-orbitals are half-filled (point of maximum paramagnetism) and then they get paired which decreases paramagnetism. Hence, paramagnetism first increases till maximum then decreases.

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