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The d & f Block Elements — Chemistry STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceChemistryThe d & f Block Elements1 Mark
MCQ
Transition elements form binary compounds with halogens. Which of the following elements will form MF3 type compounds?
  • A
    Cr
  • B
    Co
  • C
    Cu
  • D
    Ni
✓

Answer

  1. Cr
  2. Co

Explanation:

Cr and Co form MF3 type of compounds. The ability of fluorine to stabilize the highest oxidation state is due to higher lattice energy in CoF3 and higher bond enthalpy for the higher covalent compound like CrF6.

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