Write down the structural formula of the organic compounds A, B and C in the following sequence of reactions:

Account for the following:

(i) Transition metals form coloured compounds.

(ii) Actinoids show wide range of oxidation states.

(iii) Zinc has lowest enthalpy of atomization in 3d series.

OR

What must be the stable oxidation states of the transition elements with the following configuration in the ground state of their atoms: 3d³, 3d⁵, 3d⁸, 3d⁴

Write the hybridization, magnetic character and shape of [Fe(CN)₆]^3- [Atomic Number of Fe=26]

(ii) Write down IUPAC name of [Co(NH₃)₅NO₂] (NO₃)₂.

Write the reactions of Phenol with:

(i) Br₂ water (ii) dil. HNO₃ (iii) Zn dust

(a) Give chemical tests to distinguish between the following pairs of compounds.

(i) (CH₃)₂NH and (CH₃)₃N

(ii) Aniline and Ethylamine

(b) Write IUPAC name of CH₃CH₂NHCH₃.