Answer any five questions from the following: (a) To which radioactive series does 237Ac69 belong? (b) Mention one example of both d and dsp2 hybridised compound. (c) Define ionic... Answer any five questions from the following: (a) To which radioactive series does 237Ac69 belong? (b) Mention one example of both d and dsp2 hybridised compound. (c) Define ionic potential and indicate its implication in Chemistry. (d) Calculate the formal charge on the constituent atoms in CO32-. (e) Which one of 206Pb82, 207Pb82, 208Pb82 is the stablest nuclei and why? (f) Explain why the conductivity of 'Ge' is enhanced many folds when trace amount of 'As' is added to it. (g) Compare between Schottky and Frenkel defects. (h) H2O has more boiling point than HF though their hydrogen bond strength are in reverse order. Explain. Answer any two questions from the following: (a) State the Fajan's Polarization Rules. Applying these classify MgO and SnCl2 into ionic and covalent compounds as the case may be. (b) (i) The dissociation energies of N2+ and O2+ are very similar. Comment using MO theory. (ii) N3- is more resonance stabilized than HN3. Explain. (c) Is tritium expected to be an alpha or beta emitter? Write the equation for its decay. Calculate the activity of 0.19g 220Rn86 (T1/2 = 55.65s). (d) (i) State and explain Bent's rule with suitable examples. (ii) Calculate the lattice energy of NaCl using the given data. Madelung Constant (A) = 1.748, Equilibrium ionic distances = 2.79Å, Born Exponent = 8, Electronic Charge = 4.8x10^-10 esu. Read more