AIPMT 2006 Mock Test

Copper sulphate dissolves in excess of KCN to give :

In which of the following pairs are both the ions coloured in aqueous solution?(At. no. : Sc = 21, Ti = 22, Ni = 28, Cu = 29, Co= 27)

${\text{Al}}_2{\text{O}}_3$ can be converted to anhydrous ${\text{AlCl}}_3$ by heating :

The enthalpy and entropy change for the reaction:${\text{Br}}_2(\text{l})+{\text{Cl}}_2(\text{g})\to 2\text{BrCl}(\text{g})$ Are $30{\text{kJ mol}}^{-1}$ and $105{\text{JK}}^{-1}{\text{mol}}^{-1}$ respectively. The temperature at which the reaction will be in equilibrium is:

The appearance of colour in solid alkali metal halides is generally due to :