January 28, 2014

Senior Inter Chemistry - P, D and F Block Elements Weightage in IPE Exams

P - Block Elements: From the lesson "P - block elements" one 8 marks question (16th group 4 M + 17th group 4
M) and one 4 marks (or 2 two marks) question are coming.

One can expect 2 marks questions only from 15th group or 18th group. Learn CaCl2 cannot be used to dry NH3, Hydrolysis of PCl3, PCl5, P4O6, P4O10, neutral oxides of nitrogen, basicity of H3PO2, H3PO3, allotropes of
N, P, paramagnetic nature of NO, Aquaregia, passivity of Fe in Conc. HNO3, H2O is liquid (& neutral) but H2S is gas (& acidic) at room temperature, tailing of mercury, structures of SF4, SF6, S6, S8, I3−, F is stronger oxidising agent than Cl, Electron gain enthalpy of Cl is greater than F, bleaching action of SO2 &
moist Cl2, HF is liquid while HCl is gas for 2 marks.

For 4 marks learn O3, Cl2 preparation & chemical (all) properties, preparation, chemical properties, structures of XeF2, XeF4, XeF6, XeOF4, inter halogen compounds, preparation of NH3 by Haber's process, HNO3 by Ostwald's process.

d & f Block Elements

Expect one 2 marks and one 4 marks question from the lesson "d - and f-block elements & Co-ordination compounds".

Composition and uses of Misch metal, ligand, homoleptic & heteroleptic complexes, co-ordination number, co-ordination entity, central metal atom, Uni, bi, poly, ambidentate ligands with 1 example each, reasons for CuSO4.5H2O is blue but CuSO4 is colourless; aqueous Cu+2 ions are blue, aq. Zn+2 ions are colourless; Zn+2 is diamagnetic but Mn+2 is paramagnetic, Actinoid contraction is greater than Lanthanoid contraction, Calculation of magnetic moment of divalent ion of atomic numbers 25, 26, 27, Cr+2 is reducing but Mn+3 is oxidising,
E(−)(M+2/M) value of Cu is + 0.34 V are important for 2 marks.

Werner's theory with suitable examples, Lanthanide contractions & consequences, Linkage, co-ordination, ionisation, Hydrate isomerisms with examples, 4 applications of co-ordination compounds, 4 characteristic properties of transition elements, Examples in Boxes: 7.12, 7.13, 7.15, 7.16, Intext questions 7.11, 7.12, 7.13, 7.14, 7.16, 7.18 are very important for 4 marks.

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