Chemistry – Important Question Bank for Telangana (BIE) HSC 2016 Examination

1. State and explain Kohlrausch’s law of independent migration of ions.
2. What is order of a reaction? How is it different from the molecularity of a reaction? Give one example each for first order and second order reactions
3. Explain (i) Cannizaro reaction and (ii) Decarboxylation
4. Explain the acidic nature of phenols and compare it with that of alcohols.
5. Write any two methods of preparation of Aniline with equation. How does Aniline react witha) Nitrous acid andb) Chloroform in the presences of alcoholic KOH
6. How is ozone prepared? How does ozone react with

(i) PbS (ii) Moist KI (iii) Hg and (iv) Ag. Give equations.

7. Write the balanced equations for the following

(i) NaCl is heated with conc. H₂SO₄ in the presence of MnO₂

(ii) Chlorine is passed into a solution of NaI in water

8. Define hybridisation of atomic orbital’s? Explain the Sp³ and Sp² hybridisations with respect to ethane and ethylene molecules?

9.  Explain the classification of elements into S, P, d, f blocks present in the periodic table.

10. State the Principles involved in writing the electronic configuration of atoms Explain them with example and necessary diagram.

11. Write short notes on

(a) Analgesics

(b) Food Preservatives

12.  Define RMS Velocity? If the RMS Velocity of CO² gas is 4.4 x 10⁴  Cm/Sec. At a given temperature, find the RMS Velocity of Ethane

13.  Explain Boyle’s and Charle’s Lawas basing on the postulates of kinetic molecular theory of gases.

14. How Hydrogen peroxide renovates the old spoiled oil paintings Explain it with relevant reaction.

15. Explain the stages with equations that are involved in the production of an hydrous magnesium chloride from carnallite.

16.  What is allotrophy? Explain the Structure of anyone of the Crystalline forms of Carbon.

17. Explain  (a) Sandmeyer reaction and (b) Carbylamine reaction.

18.  Write the reaction of Sodium Thoisulphate with

a) Iodine and

b) Silver Nitrate. Give equations.

19.  Define Raoult’s Law. At 50^oC the vapor pressure of H₂O is 92 mm. The vapor pressure of a solution containing 18.1 gm. of non-volatile solute in 100 ml of water at the same temperature is 87 mm. Find the molecular weight of the solute.

20.  What is an acid base indicator ? Give two examples. Which type of acid base titration uses methyl orange as indicator ?

21. 14. What is meant by PH ?  What is the PH of a buffer formed by mixing 20 ml of 0.1 M NH₄ D and 2 ML of 0.1 M NH₄OH (PK_b for NH₄OH = 4.8)

22. Define the terms order and Molecularity of the reaction. Give one example each for first and second order reactions

23. State Faraday’s first law of electrolysis, A current of 10 amp. Is passed through molten AlCl₃ for 96.5 second . calculate the mass of Aluminum deposited at the cathodes. (Atomic weight of Al = 27)

24. State Raoult’s law. Calculate the vapor pressure of a solution containing 9g of glucose in 162g of water at 293K. The vapor pressure of water at 293 K is 17.535 mm Hg.

25. Explain Werner‘s theory of coordination compounds with suitable examples.

26. Give the sources of the following vitamins and name the diseases caused by their deficiency

(a) A (b) D (c ) E and (d) K

27. Explain the structures of (a)  XeF₄ and (b) XeOF₄

28. What is hyperol? Give its formula.

29. What is ammonal and give its use?

30. Write any two effects of depletion of ozone layer.

31. Name two gases which are responsible for global warning.

32. Write the possible chain isomers of the compound having molecular formula C₄H₉Br.

33. How is ethane converted to bromoethane?

34. What is PHBV? How is it useful to man?

35. Calculate the mole fraction of sodium hydroxide in 10% ww NaOH solution.

36. What is the role of cryolite in the extraction of aluminium?

37. How is change in Gibbs energy (DG) related to the emf (E) of a galvanic cell?

38. What are Schottky defects in crystalline solids ?

39. How do you distinguish between crystal lattice and unit cell?

40. Define the boiling point of a liquid in terms of its vapor pressure.

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