In which one of the pairs of ion given, there is an ion that forms a co-ordination compound with both aqueous sodium hydroxide and ammonia and an other ion that forms a co-ordination compound only with aqueous sodium hydroxide?

{Z n}^{+ 2}, {A l}^{+ 3}

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{A l}^{+ 3}, {C u}^{+ 2}

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{P b}^{+ 2}, {C u}^{+ 2}

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{C u}^{+ 2}, {Z n}^{+ 2}

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Solution

The correct option is A ${Z n}^{+ 2}, {A l}^{+ 3}$
$Z n^{2 +} + 4 N a O H \to [Z n (O H)_{4}]^{2 -}$

$Z n^{2 +} + 4 N H_{3} \to [Z n (N H_{3})_{4}]^{2 +}$

$A l^{3 +} + 4 N a O H \to [A l (O H)_{4}]^{-}$

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In which one of the pairs of ion given, there is an ion that forms a co-ordination compound with both aqueous sodium hydroxide and ammonia and an other ion that forms a co-ordination compound only with aqueous sodium hydroxide?

The correct option is A Zn+2,Al+3Zn2++4NaOH→[Zn(OH)4]2−Zn2++4NH3→[Zn(NH3)4]2+Al3++4NaOH→[Al(OH)4]−

The correct option is A ${Z n}^{+ 2}, {A l}^{+ 3}$
$Z n^{2 +} + 4 N a O H \to [Z n (O H)_{4}]^{2 -}$

$Z n^{2 +} + 4 N H_{3} \to [Z n (N H_{3})_{4}]^{2 +}$

$A l^{3 +} + 4 N a O H \to [A l (O H)_{4}]^{-}$