Question

The oxidation state and covalency of $Al$ in $[AlCl(H_{2}O{)}_5{]}^{2+}$ respectively are

• A. $+3,6$
• B. $-3,6$
• C. $+2,4$
• D. $-3,4$

Answer 1

Answer: (A)

Let oxidation state of $Al=x$
$[AlCl(H_{2}O{)}_5{]}^{2+}=x-1+5\times 0=+2$
$\Rightarrow x=+3$
It is a complex compound in which covalency of $Al$ is $6$.