CHEMISTRY SOLUTION – GSHSEB 2014
1. Calculate the number of N atoms in 5.6 g of Nitrogen gas.
 2.4088 x 1023
2. Which type of force of attraction exist in HF?
 All the given
3. X
Y
 Toluene, benzo trichloride
4. What will be the main product obtained during hydrobromination of Pent – 1 –
ene in presence of Benzoyl peroxide?
 1 – Bromo pentane
5. Which air pollutant gas reduces the rate of photosynthesis?
 NO2
6. Which of the following is non-biodegradable?
 Glass
7. Identify the molecule with zero dipole moment.
 CCl4
8. Which of the following species has diamagnetic property?
 O22+
9. Which one of the following statement is incorrect?
 Bond polarity can be explained on basis of Lewis principle.
10. Which type of bond is observed in Ethane 1,2 diol in the given option?
 Intra-molecular H-bond
11. What will be the number of σ and π bonds in Biphenyl respectively?
 23 σ and 6 π
12. The hybrid state of carbon in acetylene is same as that of ________
 BeH2
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14. Which of the following substitution reaction of alkane is reversible?
 Iodination
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13. Which of the following hydrocarbons cannot have cyclic type?
 Alkynes
15. Which of the following molecular type will have seesaw shape?
 AB4E
16. The difference in geometric shape of the molecule ois not dependent on
________
 Resonance
17. The time taken for diffusion of CO2 is twice than that of unknown gas of same
volume under identical condition. Calculate the molecular weight of unknown
gas.
 11 g/mol
18. What will be the volume of CO2 produced at STP when 5 gm of CaCO3 is
decomposed?
 1.12 L
19. Which of the following is used as catalyst in preparation of PVC?
 HgCl2
20. Which mixture is used as Lindlar’s catalyst?
 Pd + charcoal
21. Friedel Craft’s reaction of Toluene with Ethanoic anhydride produces __________
 p-methyl acetophenone
22. Give IUPAC name of (CH3)3C.C≡C.C(CH3)3
 2, 2, 5, 5 – tetra methyl hex – 3 – yne
23. For the given reaction:
4 NH3 + 5 O2 ⇋ 4 NO + 6 H2O
Select the correct option for the change in Enthalpy.
 ∆U – 5RT
24. If at 550 K temperature, Hydrogen gas and oxygen gas reacts to form water
vapour in presence of catalyst, calculate the total pressure of vessel, if the partial
pressures of hydrogen gas is 2 bar and that of oxygen gas is 1 bar at 550 K in a
closed vessel.
 Less than 3 bar
26. Joule K-1 gm-1 is the unit of ______
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25. On which factor does vapour pressure of liquid at fixed temperature depend
upon?
 All of the given
 Specific heat capacity
27. Fly ash is mainly the waste produced by which industry?
 Thermal power industry
28. Unit of COD is ________
 mg Litre-1
29. Which oxide is acidic?
 B2O3
30. Which gas has contribution of 8% in global warming?
 O3
31. Which of the following property is extensive property?
 Elevation in boiling point
32. For a reaction value of K is 7.105 x 10-6, what will be the change in free
energy?
 ∆G > 0
33. In which phenomenon entropy decreases?
 Crystallization of salt
34. if substance is completely pure crystalline at 273 K, which of the following
state function will be zero at 273 K?
 Entropy
35. Which gas is useful in buffer system to control pH of blood?
 CO2
36. Which of the following substance is used in the making of tools?
 WC
37. Whicn anion unit is observed inMuscovite?
 (Si2O5-2)n
39. Which of the following is not a Lewis acid?
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38. Which of the following given structure if Silicones is correct?

 CCl4
40. (NH4)2CO3 ⇋ 2 NH3 + CO2 + H2O
If the total pressure is Pat equilibrium then what will be the volume of
equilibrium constant, Kp in a closed vessel?

41. What will happen if the equilibrium system is kept in ice bath?.
2 NO2 ⇋ N2O4, ∆H = -ve
Brown colourless
 Colour intensity decreases
42. In which of teh following cses does reaction go the farthest for completion?
 K = 103
43. Which will show the highest pH?
 1 N NaOH
44. The reagent NH4Cl and aq. NH3 will precipitate ions of group _______
 Group III A
45. Which solutions, when mixed, forms acidic buffer?
 CH3COONa + CH3COOH
46. Arrange the following acids in decreasing order of acidity:
(I) H2SO4
(II) H3PO4
(III) HClO4
 III > I > II
47. What will be the stability order of dihalides of group – 14?
 CX2 << SiX2 << GeX2 << SnX2 < PbX2
48. he solubility of PbCl2 will be goiven by the equation.

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50. Which compound is obtained on reaction of Diborane with ammonia aat 450 K
temperature?
 B3N3H6
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49. Which ion gives green coloured bead during qualitative analysis by Borax
bead test?
 Cr3+