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

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryThe d & f Block Elements3 Marks
Question
Identify the metal and justify your answer.
  1. Carbonyl M (CO)5
  2. MO3F
✓

Answer

It is = 0

x = +7M is in +7 oxidation state so that the given compound is MnO3F

  1. Fe(CO)5 by EAN rule

EAN = x + 2 × 5 = 36 (Kr is the nearest inert gas)

x = 26 (atomic no. of the metal) so the metal is iron.

  1.  MO3F is MnO3F

In MO3F let us assume M = x

x + 3 × (-2) + (-1)

x = +7

M is in + 7 osidation state so that the given compound is MnO3F

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