KCET 2014 Chemistry Solved Paper

Ion forms a coordination compound with both aqueous sodium hydroxide and ammonia and other ions forms coordination compound only with aqueous sodium hydroxide.Zinc forms Na2[Zn(OH)4] coordination compound with NaOH
Zinc forms a colorless tetraammine with the formula
[Zn(NH3)4]2+
Zn+4NH3(aq)→[Zn(NH3)4]2+
Aluminum forms complex with only aqueous sodium hydroxide Na3[Al(OH)6] and not with ammonia.
and Al+NH3(aq)→ no reaction