Q16 / 160 · AP EAMCET 2014 · Chemistry

The oxidation state and covalency of $\mathrm{Al}$ in $\left[\mathrm{AlCl}\left(\mathrm{H}_2 \mathrm{O}\right)_5\right]^{2+}$ are respectively

  • A
    $+6,6$
  • Correct answer
    B
    $+3,6$
  • C
    $+2,6$
  • D
    $+3,3$

Solution

$$ \left[\mathrm{AlCl}\left(\mathrm{H}_2 \mathrm{O}\right)_5\right]^{2+} $$ Let oxidation state of $\mathrm{Al}$ is $\mathrm{x}$. $$ \begin{aligned} & x+(-1)+5(0)=+2, \\ & x=+3 \end{aligned} $$ Covalency of $\mathrm{Cl}=1$, covalency of $\mathrm{H}_2 \mathrm{O}=5$ $\therefore$ Total covalency $=1+5=6$

Hence, the correct answer is option: 'B'.

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