Chemistry – Important Questions Bank for Tripura (TBSE) HSC 2016 Examination

1. A compound having the molecular formula C₃H₆ O forms a crystaline white precipitate with sodium bisulphite and reduces Fehling’s solution. Suggest the structural formula and name of the compound. Name an isomer for it from a group other than its own.

2.  Arrange the following compounds in increasing order of their indicated property
3. Benzoic acid, 4-nitrobenzoic acid, 3,4-Dinitrobenzoic acid, 4-methoxy benzoic acid (Acid strength)

CH₃ CH₂ CH(Br)COOH, CH₃ CH(Br)CH₂ COOH, (CH₃ ) ₂ CHCOOH,  CH₃ CH₂ CH₂ COOH (Acid strength)

4. How would you bring about the following conversions :

i) Ethanal→But-2-enal

ii) Propanone→Propene

 iii) Benzoic acid→Benzaldehyde

5. How would you account for the following :

i) Phosphorus (P₄ ) is more reactive than nitrogen (N₂ )

ii) The electron gain enthalpy of Sulphur atom has a greater negative value than that of oxygen atom.

 iii) Bond dissociation energy of F₂ is less than that of Cl₂

6. Draw the structure of the following :

i) BrF₃

ii) XeF₂

7.  How would you account for the following :

i) NH₃ is stronger base than PH₃

ii) H₂ S is less acidic than H₂ Te

 iii) Of the noble gases, only Xenon is known to form well established chemical compounds.

8. State Kohlrausch law of independent migration of ions. Write an expression for the molar conductivity of acetic acid at infinite dilution according to Kohlrausch Law.

9. Calculate ˄ᴼ_m for acetic acid.

given that ˄ᴼ_m (HCl)=426 S cm² mol^-1

 ˄ᴼ_m (Nacl)=126S cm² mol^-1

˄ᴼ_m (CH₃ COONa) =91 S cm² mol^-1

10. Draw the structure of the following :

i) H₂ S₂ O₈

ii) HClO₄

11.  Draw the structures of monomers of the following polymers.

i) Polythene

ii) PVC

iii) Teflon.

12. Name the monomer of Nylon 6, 6. Why it is so called?

13. What is Vuleanisation of rubber?

14. Distinguish between antiseptic and disinfectant

15. Name one medicine which acts as both analgesic and antipyretie.

16. Why lyophilic colloids are more stable than lyophobic colloids

17. Define Associated colloid.

18. Complete the following reactions :-

i) MnO₄ ^–(aq)+S₂ O₃ ^2-(aq)+H₂ O(l)→

ii) Cr₂ O₇ ^2-(aq)+H₂ S(g)+H⁺ (aq)→

19.  Calculate the magnetic moment of Fe³⁺

20. Give the IUPAC name of [COCl₃ (NH₃ )₂ (H₂ O)]

21.  Calculate the oxidation number of Fe in K₄ [Fe (CN)₆]

22. Find the hybridised state and magnetic property of [Cr (NH₃ ) ₆ ] Cl₃

23.  Haloalkanes are more reactive than Haloarenes–Explain.

24. Calculate the boiling point of a solution when 0.360 gm glucose is dissolved in 100 gm water.

[K_b for water=0.52 k Kgmol^-1]

25.  Give one example of a zero order reaction.

26.  aA+bB→cC+dD

Write the rate of the above reaction.

27.  Why Copper is obtained only by roasting of Cu₂ S?

28.  What is the principle lying behind in the purification of metal by—

i) Electrolytic refining

ii) Vapour phase refining.

29.  Explain inert pair effect.

30.  What is Lanthanoid Contraction

31.  Cr (II) and Mn (III) both have d⁴ electronic configuration, yet Cr (II) is reducing whereas Mn (III) is oxidising agent.—Explain

32.  Arrange CH₃ NH₂ , (CH3 ) ₂ NH, (CH₃ ) ₃ N and NH₃ in order of increasing basicity in

(i) gaseous phase and

(ii) aqueous solution.

33. Distinguish the following pairs by one Chemical test—

i) CH₃ NH₂ and C₆ H₅ NH₂

ii) CH₃ CN and CH₃ NC

34. What happens when glucose reacts with—

i) Bromine water

ii) HI  —Write with equation

35.  Metallic Copper forms fcc crystal. If the density and atomic mass of Copper are 8.9 gm/cc and 63.5 respectively then find the edge length of the cube. 3 20.

36. A first order reaction is found to have a rate constant, K=5.5×10^-14S^-1   –Find the half life of the reaction.

37.  What is activation energy?

Let’s try to make this a two way exercise. While we gather the question banks, you might have some inputs on this too! Please use the comments box below and post questions that you think are important from your analysis. It would help the HSC community a lot.

Do subscribe to our updates so that you do not miss out on any important information that we push your way.