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5. Co-ordination chemistry — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistry5. Co-ordination chemistry1 Mark
MCQ
The oxidation number of $Cr$ in the complex ${[Cr{({H_2}O)_4}C{l_2}]^ + }$
  • A
    $1$
  • ✓
    $3$
  • C
    $5$
  • D
    $6$
✓

Answer

Correct option: B.
$3$
b
(b) ${[\mathop {Cr}\limits^{ * \,\,} {({H_2}O)_4}C{l_2}]^ + }$

$x + 0 + 2\,( - 1) = + \,1$; $x - 2 = + \,1$

$x = + \,3$ for $Cr$ in complex.

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