Chemistry CET Exam Question Paper-2015

2015 Karnataka Chemistry CET Exam Question Paper For Medical and Engineer Courses

KCET-2015 Chemistry Question Paper

1. Arrange the following compounds in the increasing order of their acidic strength

        i. m-nitrophenol         ii. m-cresol

         iii. phenol iv.              m-chlorophenol

(1) ii < iii < iv < i

(2) iii < ii < i < iv

(3) ii < iii < i < iv

(4) ii < iv < iii < i

2. In the reaction

image

heat of formation of SO2 is

(1) 2x – y

(2) x + y

(3) 2x + y

(4) x – y

3. Which of the following is not true ?

(1) Prontosil is not converted into sulphanilamide in the body.

(2) Erythromycin is a bacteriostatic antibiotic.

(3) Vancomycin is a broad spectrum antibiotic.

(4) Ampicillin is not a natural antibiotic.

4. Using MOT, compare O+2 and O-2 species and choose the incorrect option.

(1) O+2 is diamagnetic while O-2 is paramagnetic.

(2) O+2 have higher bond order than O-2,

(3) Both O+2 and O-2 are paramagnetic.

(4) O-2 is less stable.

5. Which of the following compound possesses the “C - H" bond with the lowest bond dissociation energy ?

(1) n-pentane

(2) Toluene

(3) 2.2-dimethyl propane

(4) Benzene

6. The correct statement is

(1) There is maximum pπ - pπ back bonding in BF3

(2) BF3, is the strongest Lewis acid among the other boron halides.

(3) There is minimum pπ - pπ back bonding in BF3

(4) BI3 is the weakest Lewis acid among the boron halides.

7. Acetic acid is treated with Ca(OH)2, and the product so obtained is subjected to dry distillation. The final product is

(1) propanone

(2) ethanal

(3) ethanol

(4) propanal

8. In the sequence of following reactions

image

the starting compound ‘P’ is

(1) o-bromo toluene

(2) o-nitro toluene

(3) p-nitro toluene

(4) m-nitro toluene

9. An alkali metal hydride (NaH) reacts with diborane in ‘A’ to  give a tetrahedral compound ‘B’ which is extensively used  as reducing agent in organic synthesis. The compounds ‘A’ and ‘B’ respectively are

(1) C6H6 and NaBH4

(2) C2H6 and C2H5Na

(3) (C2H5)20 and NaBH4

(4) CH3COCH3 and B3N3H6

10. Water softening by Clark’s process uses

(1) Na2CO3

(2) CaHCO3

(3) Ca(OH)2

(4) NaHCO3

11. One of the following conversion results in the change of hybridization and geometry :

(1) BF3 to BF4

(2) CH4 to C2H6

(3) H2O toH3O+

(4) NH3 to N+H4

12. In presence of HCl, H2S results the precipitation of Group-2 elements but not Gp-4 elements during qualitative analysis. It is due to

(1) lower concentration of S2-

(2) higher concentration of S2-

(3) lower concentration of H+

(4) higher concentration of H+

13. The two electrons have the following set of quantum numbers :

P = 3, 2,-2, + ½

Q = 3, 0, 0, + ½

Which of the following statement is true ?

(1) P has lesser energy than Q

(2) P and Q have same energy

(3) P and Q represent same electron

(4) P has greater energy than Q

14. Orion has monomeric unit

(1) Vinyl cyanide

(2) Acrolein

(3) Isoprene

(4) Glycol

15. Adenosine is an example of

(1) Pyrimidine base

(2) Nucleotide

(3) Nucleoside

(4) Purine base

16. While charging the lead storage battery,_________ .

(1) PbS04 on cathode is oxidized to Pb

(2) PbS04 on anode is reduced to Pb

(3) PbS04 on anode is oxidized to PbO2

(4) PbS04 on cathode is reduced to Pb

17. The unit cell with crystallographic dimensions, a ≠ b ≠ c, α = γ = 90 and β ≠ 90 is

(1) Orthorhombic

(2) Triclinic

(3) Tetragonal

(4) Monoclinic

18. Sodium metal crystallizes in B.C.C. lattice with edge length of 4.29 A. The radius of sodium atom is

(1) 2.145 A

(2) 2.857 A

(3) 1.857 A

(4) 1.601 A

19. On heating with concentrated NaOH solution in an inert atmosphere of CO2, white phosphorous gives a gas. Which of the following statement is incorrect about the gas ?

(1) It is highly poisonous and has smell like rotten fish.

(2) It is less basic than NH3

(3) It’s solution in water decomposes in the presence of light.

(4) It is more basic than NH3

20. In the given set of reactions

image

the 1UPAC name of product ‘Y’ is

(1) Butan-2-amine

(2) N-Methylpropanamine

(3) N-Methylpropan-2-amine

(4) N-Isopropylmethanamine

21. H2O2, cannot oxidise

(1) O3

(2) PbS

(3) KI

(4) Na2SO3

22. Which of the following will be able to show geometrical isomerism?

(1) MABCD - Square planar

(2) MA3B - Square planar

(3) MABCD – Tetrahedral

(4) MA2B2 – Tetrahedral

23. Copper is extracted from Copper pyrites by heating in a Bessemer converter. The method is based on the principle that

(1) Copper has less affinity for oxygen than Sulphur at high temperature.

(2) Copper has more affinity for oxygen than Sulphur at high temperature.

(3) Sulphur has less affinity for oxygen at high temperature.

(4) Iron has less affinity for oxygen than Sulphur at high temperature.

24. The electrolyte having maximum flocculation value for AgI/Ag+ sol. is

(1) Na2SO4

(2) NaCl

(3) Na3PO4

(4) Na2S

25. In a first order reaction, the concentration of the reactant is reduced to 12.5% in one hour. When was it half completed ?

(1) 30 min

(2) 3 hr

(3) 15 min

(4) 20 min

26. 0.06%(w/v) aqueous solution of urea is isotonic with

(1) 0.01 M glucose solution

(2) 0.06% glucose solution

(3) 0.1 M glucose solution

(4) 0.6% glucose solution

27. In H2 - 02 fuel cell the reaction occurring at cathode is

image

28. The distinguishing test between methanoic acid and ethanoic acid is 

(1) Esterification test

(2) Litmus test

(3) Sodium bicarbonate test

(4) Tollen’s test

29. The hydrolysis of optically active 2-bromobutane with aqueous NaOH result in the formation of           

(1) (±) butan-1-ol      

(2) (+) butan-2-ol

(3) (±) butan-2-ol       

(4) (-) bu tan-2-ol

30.

image

Here M and Z are           

(1) Fe, FeS       

(2) Cu, ZnS

(3) Al, Al2S3       

(4) Zn, ZnS

31. The electronic configuration of Gd2+ is (at. no. of Gd is 64)

(1) [Xe] 4f7 5d1.6s2       

(2) [Xe]4f8

(3) [Xe] 4f7 5d1      

(4) [Xe] 4f7

32. Number of possible alkynes with formula C5H8 is

(1) 4

(2) 2

(3) 5

(4) 3

33. Glycogen is

(1) structurally very much similar to amylopectin

(2) a polymer of β-D-glucose units

(3) structurally similar to amylopectin but extensively branched

(4) a structural polysaccharide

34. How many ions per molecule are produced in the solution when Mohr salt is dissolved in excess of water ?

(1) 6   

(2) 4

(3) 10   

(4) 5

35. Which of the following curve is in accordance with Freundlich adsorption isotherm ?

image

36.

image

The product ‘B’ is

image

37. On heating potassium permanganate, one of the following compound is not obtained :

(1) MnO-,   

(2) O2

(3) K2MnO4   

(4) MnO

38. The salt which responds to dilute and concentrated H2S04 is   

(1)    Na2SO4  

(2)    CaF2   

(3)    Na3P04   

(4)    Ba(N03)2

39. Half life period of a first order reaction is the rate after 20 min is  10 min.    Starting with initial concentration 12 M,

(1) 0.0693 x 3 M min-1   

(2) 0.0693 M min-1

(3) 0.0693 x 4 M min-1   

(4) 0.693 x 3 M min-1

40. Which of the following aqueous solution has the highest freezing point ?

(1) 0. I M NaCl

(2) 0. I M Sucrose

(3) 0.01 M Na2SO4

(4) 0.01 M NaCl

41. 0.30 g of an organic compound containing C, H and Oxygen on combustion yields 0.44 g C02 and 0.18 g H2O. If one mol of compound weighs 60, then molecular formula of the compound is

(1) C4H60

(2) CH20

(3) C2H402

(4) C3H8O

42. For one of the element various successive ionization enthalpies (in kJ mol-1) are given below :

image

The element is

(1) Al

(2) Si

(3) Mg

(4) P

43. The aqueous solution of following salt will have the lowest pH :

(1) NaCl02

(2) NaClO3

(3) NaCl04

(4) NaClO

44. One of the following is an essential amino acid.

(1) Isoleucine

(2) Tyrosine

(3) Serine

(4) Cysteine

45. The formation of cyanohydrin from a ketone is an example of

(1) Electrophilic addition

(2) Nucleophilic substitution

(3) Electrophilic substitution

(4) Nucleophilic addition

46. 100 cm3 of 1 M CH3COOH was mixed with 100 cm3 of 2 M CH3OH to form an ester. The change in the initial rate if each solution is diluted with equal volume of water would be

(1) 0.5 times

(2) 2 times

(3) 0.25 times

(4) 4 times

47. How many Coulombs of electricity are required for the oxidation of one mol of water to dioxygen ?

(1) 1.93 x 105 C

(2) 9.65 x 104 C

(3) 19.3 x 105 C

(4) 1. 93 x 104C

48. Cheilosis and digestive disorders are due to the deficiency of

(1) Riboflavin

(2) Thiamine

(3) Pyridoxine

(4) Ascorbic acid

49. One of the following amide will not undergo Hoffmann bromamide reaction :

(1) C6H5CONH2

(2) CH3CONH2

(3) CH3CH2CONH2

(4) CH3CONHCH3

50. Iodoform can be prepared from all, except

(1) propan-1-ol

(2) propan-2-ol

(3) acetophenone

(4) butan-2-one

51. The arrangement of following compounds :

i. bromomethane

ii. bromoform

iii. chloromethane

iv. dibromomethane

In the increasing order of their boiling point is

(1) ii < iii < i < iv

(2) iii < i < iv < ii

(3) i < ii < iii < iv

(4) iv < iii < i < ii

52. The complex ion having minimum magnitude of Δ0(CFSE) is

(1) [Co(Cl)6]3-

(2) [Cr(CN)6]3-

(3) [Cr(H20)6]3+

(4) [Co(CH3)6]3+

53. Which of the following colloids cannot be easily coagulated ?

(1) Macromolecular colloids

(2) Lyophobic colloids

(3) Irreversible colloids

(4) Multimolecular colloids

54. After adding non-volatile solute freezing point of water decreases to -0.186 °C. Calculate ΔTb if Kf = 1.86 K kg mol-1 and Kb = 0.521 K kg mol-1

(1) 1.86

(2) 0.521

(3) 0.0186

(4) 0.0521

55. Which of the following compound of Xenon has pyramidal geometry ?

(1) XeO3

(2) XeOF4

(3) XeF4

(4) XeF2

56. Cryolite is

(1) Na3AlF6 and is used in the electrolysis of alumina tor lowering the melting point and increasing the conductivity of alumina.

(2) Na3AlF6 and is used in the electrolysis of alumina for decreasing electrical conductivity.

(3) Na3AlF6 and is used in the electrolytic refining of alumina.

(4) Na3AlF6 and is used in the electrolysis of alumina for lowering the melting point of alumina only

57. Identify ‘Q’ in the following sequence of reactions :

image

58. What amount of dioxygen (in gram) contains 1.8 x1022 molecules ?

(1) 9.60

(2) 0.0960

(3) 96.0

(4) 0.960

59. The pair of compound which cannot exist together in solution is

(1) NaHCO3 and Na2CO3

(2) NaHCO3 and NaOH

(3) Na2CO3 and NaOH

(4) NaHCO3 and H20

60. Plot of Maxwell’s distribution of velocities is given below :

image

Which of the following is correct about this plot ?

(1) T1 > T2

(2) T1 < T2

(3) V1 < V2

(4) f1 > f2