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June 4th, 2016, 02:30 PM
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BCECE Solved Question Paper
Hello sir, I am Suraj. I want you to help me by providing me with the Bihar Combined Entrance Competitive Examination (BCECE) solved question paper of chemistry. Can you help me? As you have asked for the Bihar Combined Entrance Competitive Examination (BCECE) solved question paper of chemistry, I am providing you with it, check below for the details BCECE Chemistry paper 1. The IUPAC name of lactic acid is (A) 2-hydroxyethanoic acid (B) 2-hydroxypropanoic acid (C) 3-hydroxybutanoic acid (D) 2-hydroxybutanoic acid 2. The number of optical isomers of HOOC – (CHOH)2 – COOH is (A) 2 (B) 3 (C) 4 (D) 0 3. CH3 free radical contains C with following hybridization : (A) sp2 (B) sp (C) sp3 (D) None of these 4. Electrolysis of CH3COOK forms following on anode : (A) H2 + CH4 (B) CH4 + CO2 (C) C2H6 + H2 (D) C2H6 + CO2 5. This causes explosions in coal mines : (A) H2 + air (B) CO + air (C) C2H6 + air (D) CH4 + air 6. CH CH –––––––––––––––– KMnO4 + OH – product is (A) CH3CHO (B) CH2OH.CH2OH (C) COO– | COO– (D) CHO | CHO 7. The ratio of CH2=CHCH=CH2 to styrene in Buna-S is (A) 1 : 1 (B) 2 : 1 (C) 3 : 1 (D) 1 : 2 8. Esterification is involved in the formation of (A) Decron (B) Nylon (C) Cellulose (D) Wool 9. This is formed from a cyclic amide : (A) Decron (B) Nylon (C) Wool (D) PVC 10. Bitumen contains hydrocarbons with C-atoms in the range of (A) C20 – C30 (B) C30 – C40 (C) C16 – C20 (D) C12 – C16 11. Williamson’s synthesis produces (A) Alkane (B) Amide (C) Ester (D) Ether 12. CHCl Ag Powder ––––––––––– Heat produces (A) CH CH (B) CH2 = CH2 (C) CH4 (D) CH3 – CH3 13. The % of ethyl alcohol in the liquid produced by fermentation of starch is generally (A) 5 – 10 % (B) 90 – 100 % (C) 75 – 90 % (D) 40 – 50 % 14. Urea behaves as (A) Monoacidic base (B) Diacidic base (C) Neutral compound (D) Acid 15. Biuret is (A) NH2CONHCOCH3 (B) NH2CONHNO2 (C) HNCO (D) NH2CONHCONH2 16. Which of the following will give methylamine upon reaction with acetamide ? (A) PCl 5 (B) NaOH + Br2 (C) Soda lime (D) Hot Conc. H2SO4 17. Spent lye is formed during the preparation of a (A) Detergent (B) Soap (C) Ketones (D) Esters 18. Its solution gives blue colour with I2 solution : (A) Glucose (B) Sucrose (C) Starch (D) Insulin 19. How many geometrical isomers are there for [Pt(Py)(NH3)BrCl] ? (A) 4 (B) 0 (C) 2 (D) 3 20. Which one is a peroxide ? (A) KO2 (B) BaO2 (C) MnO2 (D) NO2 21. Which is the oxidation state generally found in lanthanides ? (A) 4 (B) 2 (C) 5 (D) 3 22. How many bridge 0 atoms are present in P4H10 ? (A) 6 (B) 4 (C) 2 (D) 5 23. Which is produced by contact process ? (A) H2SO4 (B) Steel (C) S (D) NaOH 24. How many out of TiF6 2–, CoF6 3–, Cu2Cl 2 and NiCl 2– (Ti = 22, Co = 27, Cu = 29, Ni = 28) are colourless ? (A) 0 (B) 2 (C) 3 (D) 1 25. Which of the following is not concentrated by Froth floatation process ? (A) Argentite (B) Galena (C) Copper pyrite (D) Bauxite 26. In which molecule all bonds are not identical ? (A) ClF3 (B) BF3 (C) AlF3 (D) NF3 27. Which compound behaves as electron deficient ? (A) B2H6 (B) C2H6 (C) PH3 (D) SiH4 28. Which one lacks metal carbon bond ? (A) Al(OC2H5)3 (B) C2H5MgBr (C) K[Pt(C2H4Cl 3)] (D) Ni(CO)4 29. This gas decolorizes Bromine water : (A) SO2 (B) HBr (C) HCl (D) H2S 30. Gypsum on heating above 473 K gives (A) CaSO4.2H2O (B) CaSO4 (C) CaSO4 H2O (D) SO3 + CaO 31. Which one is a major impurity in pig iron ? (A) Si (B) O (C) S (D) C 32. Pewter contains (A) Al (B) Ag (C) Pb (D) Au 33. Calomel is (A) HgCl 2 (B) Hg2Cl (C) HgI2 (D) HgO 34. This element is sometime called quick silver : (A) Au (B) Cu (C) Sn (D) Hg 35. Roasting of Cinnabar produces (A) HgO (B) ZnO (C) Hg (D) HgS 36. Gypsum is (A) CaSO4 2H2O (B) (CaSO4)2 H2O (C) CaOCl (D) CaCl 2 H2O 37. Formalin is a solution of (A) HCHO (B) HCOOH (C) CH3OH (D) CH3CHO 38. The reaction of sunflower oil with NaOH can be called (A) Cracking (B) Saponification (C) Polymerization (D) Esterification 39. This is a thermoplastic : (A) PVC (B) Bakelite (C) Melamine (D) Protein 40. Which of the following does not contain any triple bond ? (A) N2 (B) HCN (C) C2H2 (D) NH3 41. Which one of the following has a square planar structure ? (A) PCl 5 (B) [Cu(NH3)4]2+ (C) SiF6 (D) CH4 42. Which one of the following is not a fuel gas ? (A) Water gas (B) Producer gas (C) Laughing gas (D) Marsh gas 43. This is involved in rusting of Fe : (A) O2 (B) H2 (C) N2 (D) Cl 44. The solute can be separated from solution by (A) Filtration (B) Evaporation (C) Decantation (D) Sedimentation 45. Salt is obtained from sea water by (A) Sublimation (B) Evaporation (C) Crystallization (D) Distillation 46. Industrial production of polythene is done by polymerization of (A) Methane (B) Acetylene (C) Ethylene (D) Styrene 47. The following is used for making natural rubber hard : (A) Petrol (B) H2SO4 (C) P4 (D) S 48. This is responsible for green house effect (A) N2 (B) O2 (C) O3 (D) CO2 49. The nucleus of H-atom has (A) only proton (B) only neutron (C) one proton + one neutron (D) only electron 50. This has one C – C bond, one C = C bond and one C C bond (A) C4H6 (B) C4H4 (C) C4H3 (D) C4H5 51. Which one of the following has linear structure ? (A) SO2 (B) CO2 (C) NO2 (D) H2O 52. The reaction of P4 + NaOH involves the following for P : (A) Oxidation (B) Reduction (C) Both oxidation and reduction (D) Neutralization 53. As compared to a gas X, the diffusion rate of CH4 is 2 times. The molecular weight of gas X is (A) 64 (B) 32 (C) 4 (D) 8 54. This reagent is used for testing NH3 : (A) Baeyer (B) Nessler (C) Fenton (D) Mollisch 55. If 5.8 g NaCl is dissolved in 90 g of H2O, the mole fraction of NaCl is (molecular weight of NaCl = 58.5) (A) 0.1 (B) 0.01 (C) 0.2 (D) 0.02 56. Ink is a (A) Sol (B) Gel (C) Foam (D) Emulsion 57. Sol of which of the following is positively charged ? (A) As2O3 (B) Fe(OH)3 (C) Au (D) Starch 58. Saliva contains (A) Lipase (B) Trypsin (C) Amylase (D) Insulin 59. Which one is not correct ? (A) H = E – V (B) H = E + V (C) E = Q – W (D) W = P × V 60. For which of the following heat of neutralization will be 13.7 kcal ? (A) HCl + NH4OH (B) HNO3 + KOH (C) NaOH + CH3COOH (D) H2SO4 + NH4OH 61. In which of the following H2O2 is an oxidising agent ? (A) 2KI + H2O2 2KOH + I2 (B) Ag2O + H2O2 2Ag + H2O + O2 (C) PbO2 + H2O2 PbO + H2O + O2 (D) O3 + H2O2 2O2 + H2O 62. This does not cause hardness of water : (A) CaCl 2 (B) MgSO4 (C) Na2SO4 (D) MgCl 63. 10 volume H2O2 is about (A) 30% (B) 3% (C) 1% (D) 10% 64. Which one is a true peroxide ? (A) NO2 (B) MnO2 (C) BaO2 (D) SO2 (A) NO2 (B) MnO2 (C) BaO2 (D) SO2 65. Slaked lime is (A) CaCO3 (B) CaO (C) Ca(OH)2 (D) Ca(C2O4) 66. Which one decomposes on heating ? (A) MgCO3 (B) Na2CO3 (C) K2CO3 (D) Rb2CO3 67. Solder contains (A) Sn (B) Al (C) Cu (D) Cd 68. This contains CeO : (A) Alum (B) Pyrex glass (C) Crooks glass (D) Ordinary glass 69. How many oxides of N are neutral ? (A) 0 (B) 2 (C) 1 (D) 4 70. CuSO4 solution with excess of KCN gives (A) Cu(CN)2 (B) Cu(CN) (C) K2[Cu(CN)4] (D) K3[Cu(CN)4] 71. Acetylene has (A) 5bonds (B) 4+ 1bonds (C) 3+ 2bonds (D) 2+ 2bonds 72. How many isomeric amines are possible for C3H9N ? (A) 2 (B) 3 (C) 4 (D) 5 73. Which one can give either methane or ethane by a single step upon reaction with different reagents ? (A) CH3I (B) C2H5I (C) CH3OH (D) C2H5OH 74. This will give 2, 2-dibromopropane : (A) CH CH + 2HBr (B) CH3C CH + 2HBr (C) CH3 CH = CH2 + HBr (D) CH3 – CH2 – CH2 = CH2 + HBr 75. Petrol is a mixture of hydrocarbons with following number of C-atoms : (A) C3 – C5 (B) C5 – C6 (C) C6 – C8 (D) C7 – C9 76. Phosgene is (A) C6H5NC (B) CCl (C) COCl 2 (D) C2H5NH2 77. Oxidation of this gives methyl ethyl ketone : (A) 2-Propanol (B) 1-Butanol (C) 2-Butanol (D) 1-Butyl alcohol 78. This does not react with Na : (A) C2H5OH (B) CH3CHOHCH3 (C) CH3 – O – CH3 (D) CH3COOH 79. Lucas reagent is (A) Conc. HCl + anhydrous ZnCl 2 (B) Conc. HCl + ZnCl 2 (C) Conc. HNO3 + anhydrous ZnCl 2 (D) Conc. HNO3 + ZnCl 2 80. This compound has one alcoholic and one aldehydic functional group : (A) Aldol (B) Cyanohydrin (C) Grignard reagent (D) Acetoacetate 81. Which is the strongest acid ? (A) HCOOH (B) CH3COOH (C) CH3CH2COOH (D) ClCH2COOH 82. Paraaldehyde is (A) Vinager (B) 40% HCHO (C) (CH3CHO)3 (D) C6H5CHO 83. (CH3COO)2Ca + (HCOO)2Ca mixture upon heating gives (A) CH3COCH3 (B) CH3CHO (C) HCHO + CaCO3 (D) CH3CHO + CaCO3 For more details, you can refer to the attached file; Last edited by Neelurk; June 18th, 2020 at 09:01 AM. |