MCQ
Transition metals are often paramagnetic owing to:
  • A
    High m.p. and b.p. of transition metals.
  • B
    Presence of vacant d-orbitals.
  • C
    Presence of one or more unpaired d-electrons.
  • D
    Their less electropositive nature as compared to the elements of groups IA and IIA.

Answer

  1. Presence of one or more unpaired d-electrons.

Explanation:

The general outer electronic configuration of d-block elements is (n - 1)d1−10 ns1−2. Hence, d - block elements often have one or more unpaired d - electrons.

Due to presence of these unpaired electrons, transition elements show paramagnetism.

Therefore transition elements are often paramagnetic due to presence of one or more unpaired d electrons.

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