Question

The correct molecular formula of the following complexes are:
(a) Pentamminechlorocobalt (III) ion
(b) Lithium tetrahydroaluminate (III)

• A. (a)$\left[Co\right(N{H}_3{)}_{5}Cl{]}^{2+}$; (b)$Li\left[Al{H}_4\right]$
• B. (a)$\left[Co\right(N{H}_3{)}_{5}Cl{]}^{3+}$; (b)$L{i}_2\left[Al{H}_4\right]$
• C. (a)$\left[Co\right(N{H}_3{)}_{5}Cl{]}^{2-}$; (b)$L{i}_4\left[Al{H}_4\right]$
• D. None of these

Answer 1

The correct option is A (a)$\left[Co\right(N{H}_3{)}_{5}Cl{]}^{2+}$; (b)$Li\left[Al{H}_4\right]$

(a) Pentamminechlorocobalt (III) ion : $\left[Co\right(N{H}_3{)}_{5}Cl{]}^{2+}$
(b) Lithium tetrahydroaluminate (III) : $Li\left[Al{H}_4\right]$