PART-A: I. Answer all questions. Each question carries 1 mark. 1 X 5 = 5 1. Give an example for a solid solution in which solute is a solid? 2. Define the term molarity. 3. Normal molar mass of solute is 246gmol-1 and observed molar mass of the same solute in a solvent is 346gmol-1. What is the value of Van’t Hoff factor (i)? 4. Give the IUPAC name of vinyl chloride? 5. Chloroform is stored in dark coloured bottles. Give reason?
Part-B: II. Answer any TWO of the following questions. Each question carries 2 marks. 2 × 2 = 4 6. Write any two differences between Frenkel and Schottky defects. 7. What are ferromagnetic substances? Give an example. 8. (a) Name a member of lanthanoid series which is well known to exhibit +4 oxidation state. (b) Actinoid contraction is greater from element to element than lanthanoid contraction. Give reason 9. Give any two differences between lanthanides and actinides.
Part-C: III. Answer any TWO of the following questions. Each Question carries 3 marks. 3 × 2 = 6 10. How is potassium dichromate (K2 Cr2O7) manufactured from chromite? Give balanced chemical equations. 11. Transition metals form large number of coordination compounds. Give any three reasons. 12. How does potassium permanganate react with (i) H2S (ii) Oxalic acid (iii) Fe2+ ions. 13. (a) Calculate the magnetic moment of Mn2+ ion in aqueous solution (Z =25). (b) Write the general electronic configuration for 3d series of elements.
