1. Is the complex [Ti(NO3)4] coloured?
2. Is the complex [Cr(NH3)6]3+3Cl- coloured?
3. Give reasons: Although aluminium is above hydrogen in the electrochemical series, it is stable in air and water.
4. give reasons: Aryl halides are less reactive than alkyl halides towards nucleophilic reagents.
5. Sodium metal crystallises in body centred cubic lattice with the cell edge, a = 4.29 A0. What is the radius of sodium atom?
Source: JEE 1994 paper