DAsKLiBrO/ 10 Eng /12 Chem

 1. Write the chemical equations involved when aniline is treated with the following reagents : (Any two)   (i) CH 3 COCl/Pyridine (ii) Br 2 water (iii) HCl     2. Define electrochemical cell. What happens if external potential applied becomes greater than E o cell ?    3. Write two differences between Order of reaction and Molecularity of reaction.   4. Account for the following :   (i) Transition metals generally form coloured compounds. (ii) Zn has the lowest enthalpy of atomisation. (iii) Atomic radii of 5d and 4d series of elements are almost identical.   5. (a) (i) Define the following terms with an example : (I) Ambidentate ligand (II) Chelate effect (ii) Write the formula of the following complex : Hexaammineplatinum(II)chloride     OR (b) (i) Write the hybridization and geometry of [Ni(CN)4] 2- . (Atomic number of Ni = 28) (ii) Write the IUPAC name of the following compl...