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12 TH STANDARD CHEMISTRY ONE MARK QUESTIONS CHAPTERS 16 TO 19.

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Presentation on theme: "12 TH STANDARD CHEMISTRY ONE MARK QUESTIONS CHAPTERS 16 TO 19."— Presentation transcript:

1 12 TH STANDARD CHEMISTRY ONE MARK QUESTIONS CHAPTERS 16 TO 19

2 1. Which has the highest boiling point ? (a) CH 3 CH 3 (b) CH 3 OH (c) C 2 H 5 OH (d) C 3 H CHOOSE THE CORRECT ANSWER

3 2. Which is soluble in H 2 O ? (a) Phenol (b) Alkanes (c) Alcohols (d) Alkenes CHOOSE THE CORRECT ANSWER

4 3. Order of reactivity of alcohol towards sodium metal is (a) primary tertiary (b) primary > secondary > tertiary (c) primary secondary < tertiary CHOOSE THE CORRECT ANSWER

5 4. The boiling point of ethyl alcohol should be less than that of (a) propane (b) formic acid (c) dimethyl ether (d) None of the above CHOOSE THE CORRECT ANSWER

6 5. Ethyl alcohol cannot be used as a solvent for CH 3 MgI because (a) CH 3 MgI reacts with alcohol giving methane (b) The reaction between them is explosive in nature (c) CH 3 MgI is converted to C 2 H 5 MgI (d) Alcohol is immicible with CH 3 MgI CHOOSE THE CORRECT ANSWER

7 6. When alcohols are converted to alkyl chlorides by thionyl chloride in presence of pyridine the intermediate formed is (a) sulphonium ion (b) chlorosulphonic acid (c) alkyl chlorosulphite (d) chlorosulphite CHOOSE THE CORRECT ANSWER

8 7. On oxidation of an alcohol gives an aldehyde having the same number of carbon atoms as that of alcohol. The alcohol is (a) 1  alcohol (b) 2  alcohol (c) 3  alcohol (d) None CHOOSE THE CORRECT ANSWER

9 8. A compound that gives a positive iodoform test is (a) 1-pentanol (b) 2-pentanone (c) 3-pentanone (d) pentanal CHOOSE THE CORRECT ANSWER

10 9. The compound that reacts fastest with Lucas reagent is (a) butan-1-ol (b) butan-2-ol (c) 2-methyl propan-1-ol (d) 2-methyl propan-2-ol CHOOSE THE CORRECT ANSWER

11 10. The ionization constant of phenol is higher than that of ethanol because (a) phenoxide ion is bulkier than ethoxide (b) phenoxide ion is stronger base than ethoxide (c) phenoxide ion is stablized through delocalisation (d) phenoxide ion is less stable than ethoxide ion CHOOSE THE CORRECT ANSWER

12 11. Among the following compounds strongest acid is (a) HC = CH (c) C 6 H 6 (c) C 2 H 6 (d) CH 3 OH CHOOSE THE CORRECT ANSWER

13 12. The most unlikely representation of resonance structures of p-nitrophenoxide ion is CHOOSE THE CORRECT ANSWER

14 13. p-nitrophenol is having lower pKa value than phenol because (a) phenol is more acidic than p-nitro phenol (b) anion of p-nitrophenol is more stabilised by resonance than that of phenol (c) degree of ionisation of p-nitro phenol is less than that of phenol (d) anion of p-nitrophenol is less stable than that of phenol CHOOSE THE CORRECT ANSWER

15 14. The reaction of Lucas reagent is fast with (a) (CH 3 ) 3 COH (b) (CH 3 ) 2 CHOH (c) CH 3 (CH 2 ) 2 OH (d) CH 3 CH 2 OH CHOOSE THE CORRECT ANSWER

16 15. When phenol is distilled with Zn dust it gives (a) benzaldehyde (b) benzoic acid (c) toluene (d) benzene CHOOSE THE CORRECT ANSWER

17 16. A compound that undergoes bromination easily is (a) benzoic acid (b) benzene (c) phenol (d) toluene CHOOSE THE CORRECT ANSWER

18 17. Isomerism exhibited by ethylene glycol is (a) position isomerism (b) chain isomerism (c) functional isomerism (d) both (a) and (c) CHOOSE THE CORRECT ANSWER

19 18. Ethylene diamine is converted to ethylene glycol using (a) Na 2 CO 3 solution (b) nitrous acid (c) NaHCO 3 (aqueous) (d) Baeyer’s reagent CHOOSE THE CORRECT ANSWER

20 19. Ethylene glycol forms terylene with (a) adipic acid (b) phthalic anhydride (c) terephthalic acid (d) oxalic acid CHOOSE THE CORRECT ANSWER

21 20. 1-propanol and 2-propanol can be best distinghished by (a) oxidation with KMnO4 followed by reaction with Fehling solution (b) oxidation with acidic dichromate followed by reaction with Fehling solution (c) oxidation by heating with copper followed by reaction with Fehling solution (d) oxidation with concentrated H 2 SO 4 followed by reaction with Fehling solution CHOOSE THE CORRECT ANSWER

22 21. Glycerol is used (a) as a sweetening agent (b) in the manufacture of good quality soap (c) in the manufacture of nitro glycerin (d) in all the above CHOOSE THE CORRECT ANSWER

23 22. The alcohol obtained by the hydrolysis of oils and fats is (a) pentanol (b) propanol (c) glycerol (d) glycol CHOOSE THE CORRECT ANSWER

24 23. The number of secondary alcoholic group in glycerol is (a) 1 (b) 2 (c) 3 (d) 0 CHOOSE THE CORRECT ANSWER

25 24. The active component of dynamite is (a) Keiselghur (b) Nitro glycerine (c) Nitro benzene (d) Trinitro toluene CHOOSE THE CORRECT ANSWER

26 25. The reaction of ethylene glycol with PI 3 gives (a) ICH 2 CH 2 I (b) CH 2 = CH 2 (c) CH 2 = CHI (d) ICH = CHI CHOOSE THE CORRECT ANSWER

27 26. The isomerism exhibited by C 2 H 5 OC 2 H 5 and CH 3 – O – CH – CH 3 is | CH 3 (a) Functional (b) metamerism (c) position (d) chain CHOOSE THE CORRECT ANSWER

28 27. Which one of the following is simple ether ? (a) CH 3 – O – C 2 H 5 (b) C 2 H 5 – O – CH 3 (c) C 2 H 5 – O – C 2 H 5 (d) C 3 H 7 – O – C 2 H 5 CHOOSE THE CORRECT ANSWER

29 28. Diethyl ether can be decomposed with (a) HI (b) KMnO 4 (c) NaOH (d) H 2 O CHOOSE THE CORRECT ANSWER

30 29. Oxygen atom of ether is (a) very active (b) Replacable (c) oxidising (d) Comparatively inert CHOOSE THE CORRECT ANSWER

31 30. According to Lewis concept of acids and bases, ethers are (a) Neutral (b) Acidic (c) Basic (d) Amphoteric CHOOSE THE CORRECT ANSWER

32 31. Intermolecular hydrogen bonds are not present in (a) CH 3 COOH (b) C 2 H 5 – O – C 2 H 5 (c) CH 3 CH 2 OH (d) C 2 H 5 NH 2 CHOOSE THE CORRECT ANSWER

33 32. When ethyl Iodide is treated with dry silver oxide it forms (a) Ethyl alcohol (b) diethylether (c) silver ethoxide (d) ethylmethyl ether CHOOSE THE CORRECT ANSWER

34 33. Williamson's synthesis is an example of (a) nucleophilic addition (b) electrophilic addition (c) electrophilic substitution (d) Nucleophilic substitution reaction CHOOSE THE CORRECT ANSWER

35 34. When ether is exposed to air for sometime an explosive substance produced is (a) peroxide (b) oxide (c) TNT (d) superoxide CHOOSE THE CORRECT ANSWER

36 35. Ether is formed when alkylhalide is treated with sodium alkoxide. This method is known as (a) Hoffmann reaction (b) Williamson's synthesis (c) Wurtz synthesis (d) Kolbe's reaction CHOOSE THE CORRECT ANSWER

37 36. The chain isomer of 2-methyl propanal is (a) 2-butanone (b) butanal (c) 2-methyl propanol (d) but-3-ene-2-ol CHOOSE THE CORRECT ANSWER

38 37. Schiffs reagent gives pink colour with (a) acetone (b) acetaldehyde (c) ethyl alcohol (d) methyl acetate CHOOSE THE CORRECT ANSWER

39 38. Isopropyl alcohol vapours with air over silver catalyst at 520 K give (a) tert.butyl alcohol (b) acetaldehyde (c) acetone (d) 2-propanol CHOOSE THE CORRECT ANSWER

40 39. Methyl ketones are usually characterised by (a) the Fehling’s solution (b) the iodoform test (c) the Schiff’s test (d) the Tollen’s reagent CHOOSE THE CORRECT ANSWER

41 40. Which of the following compounds is oxidised to give ethyl methyl ketone ? (a) 2-propanol (b) 2-pentanone (c) 1-butanol (d) 2-butanol CHOOSE THE CORRECT ANSWER

42 41. Formaldehyde polymerises to give (a) paraldehyde (b) paraformaldehyde (c) formalin (d) formic acid CHOOSE THE CORRECT ANSWER

43 42. Tollen’s reagent is (a) ammoniacal cuprous chloride (b) ammoniacal cuprous oxide (c) ammoniacal silver nitrate (d) ammoniacal silver chloride CHOOSE THE CORRECT ANSWER

44 43. When acetaldehyde is heated with Fehling solution, it gives a precipitate of (a) Cu 2 O (b) CuO (c) CuO + Cu 2 O (d) Cu CHOOSE THE CORRECT ANSWER

45 44. The compound that does not undergo Cannizzaro reaction is (a) formaldehyde (b) acetaldehyde (c) benzaldehyde (d) trimethyl acetaldehyde CHOOSE THE CORRECT ANSWER

46 45. The formation of cyanohydrin from a ketone is an example of (a) electrophilic addition (b) nucleophilic addition (c) nucleophilic substitution (d) electrophilic substitution CHOOSE THE CORRECT ANSWER

47 46. Hydrogenation of benzoyl chloride in the presence of Pd on BaSO 4 gives (a) phenol (b) benzoic acid (c) benzyl alcohol (d) benzaldehyde CHOOSE THE CORRECT ANSWER

48 47. From which of the following, tertiary butyl alcohol is obtained by the action of methyl magnesium iodide ? (a) HCHO (b) CH 3 CHO (c) CH 3 COCH 3 (d) CO 2 CHOOSE THE CORRECT ANSWER

49 48. During reduction of aldehydes with hydrazine and C2H5ONa the product formed is (a) R–CH = N–NH (b) R–C º N (c) R – C – NH 2 || O (d) R–CH 3 CHOOSE THE CORRECT ANSWER

50 49. Aldol is (a) 2-hydroxy butanol (b) 3-hydroxy butanol (c) 3-hydroxy butanal (d) 2-hydroxy butanal CHOOSE THE CORRECT ANSWER

51 50. In the reduction of acetaldehyde using LiAlH4 the hydride ion acts as (a) electrophile (b) nucleophile (c) both (a) and (b) (d) a free radical CHOOSE THE CORRECT ANSWER

52 51. Which of the following statement is wrong ? (a) 2-pentanone and 3-pentanone are position isomers (b) aqueous solution of formaldehyde is known as formalin (c) aldehydes and ketones undergo nucleophilic substitution (d) aldehydes act as reducing agents CHOOSE THE CORRECT ANSWER

53 52. A cyanohydrin of a compound X on hydrolysis gives lactic acid. The X is (a) HCHO (b) CH 3 CHO (c) (CH 3 ) 2 CO (d) C 6 H 5 CH 2 CHO CHOOSE THE CORRECT ANSWER

54 53. The IUPAC name of CH 3 – C = CH – C – CH 3 is | || CH 3 O (a) 4-methylpent-3-en-2-one (b) 2-methylpent-3-en-2-one (c) 3-methyl pent-2-en-1-one (d) None of these CHOOSE THE CORRECT ANSWER

55 54. Which of the following does not give iodoform test ? (a) aceto phenone (b) benzophenone (c) CH 3 – CHOH | CH 3 (d) CH 3 – CH – CH 2 CH 2 – CH 3 | OH CHOOSE THE CORRECT ANSWER

56 55. The compound which does not reduce Fehling solution is (a) formaldehyde (b) acetaldehyde (c) benzaldehyde (d) propionaldehyde CHOOSE THE CORRECT ANSWER

57 Conc.H 2 SO CH 3 COCH 3 The product is (a) mesitylene (b) mesityl oxide (c) phorone (d) paraldehyde CHOOSE THE CORRECT ANSWER

58 57. Which compound on strong oxidation gives propionic acid ? (a) CH 3 – CH – CH3 (b) CH 3 – CO – CH 3 | OH (c) CH3 (d) CH 3 – CH 2 – CH 2 OH | CH 3 – C – OH | CH 3 CHOOSE THE CORRECT ANSWER

59 58. The compound used in the preparation of the tranquilizer, sulphonal is (a) acetone (b) acetophenone (c) isopropyl alcohol (d) glycol CHOOSE THE CORRECT ANSWER

60 59. Calcium acetate + calcium benzoate distilation gives (a) benzophenone (b) benzaldehyde (c) acetophenone (d) phenyl benzoate CHOOSE THE CORRECT ANSWER

61 60. Bakelite is a product of reaction between (a) formaldehyde and NaOH (b) phenol and methanal (c) aniline and NaOH (d) phenol and chloroform CHOOSE THE CORRECT ANSWER

62 61. Which of the following is least acidic (a) C 2 H 5 OH (b) CH 3 COOH (c) C 6 H 5 OH (d) ClCH 2 COOH CHOOSE THE CORRECT ANSWER

63 62. Weakest acid among the following is (a) Acetic acid (b) Phenol (c) Water (d) Acetylene CHOOSE THE CORRECT ANSWER

64 63. Ester formation involves the reaction of (a) an aldehyde and a ketone (b) An alcohol with RMgX (c) Two molecules of an acid with dehydrating agent (d) An acylhalide with an alcohol CHOOSE THE CORRECT ANSWER

65 64. Heating a mixture of sodium acetate and soda lime gives (a) methane (b) ethane (c) aceticacid (d) benzene CHOOSE THE CORRECT ANSWER

66 65.The acid which reduces Tollen's reagent is (a) acetic acid (b) benzoic acid (c) formic acid (d) oxalic acid CHOOSE THE CORRECT ANSWER

67 66. The IUPAC name of CH 3 | CH 3 – CH 2 – CH – COOH is (a) a-methyl butric acid (b) 3-methyl butanoic acid (c) 2-methyl butanoic acid (d) Iso pentanoic acid CHOOSE THE CORRECT ANSWER

68 67. The Isomerism exhibited by CH 3 CH 2 COOH and CH 3 COOCH 3 is (a) metamerism (b) position (c) chain (d) functional CHOOSE THE CORRECT ANSWER

69 68. The acid that cannot be prepared by Grignard reagent (a) acetic acid (b) formic acid (c) butyric acid (d) benzoic acid CHOOSE THE CORRECT ANSWER

70 69. Which order of arrangement is correct interms of the strength of the acid (a) CH 3 –CH 2 COOH > CH 3 COOH CH 3 CH 2 COOH ClCH 2 COOH CHOOSE THE CORRECT ANSWER

71 70. The compound which undergoes intramolecular dehydration with P 2 O 5 is (a) acetic acid (b) formic acid (c) propionic acid (d) Butyric acid CHOOSE THE CORRECT ANSWER

72 71. The product is (a) CO + H 2 O (b) HCOOH (c) H 2 + CO 2 (d) HCHO + O 2 CHOOSE THE CORRECT ANSWER

73 72. When chlorine is passed through acetic acid in presence of red P, it forms. (a) acetyl chloride (b) Trichloro acetaldehyde (c) Trichloro acetic acid (d) Methyl chloride CHOOSE THE CORRECT ANSWER

74 73. Which of the following compounds will react with NaHCO 3 solution to give sodium salt and CO 2 ? (a) acetic acid (b) n-hexanol (c) phenol (d) both (a) and (c) CHOOSE THE CORRECT ANSWER

75 74. When propanoic acid is treated with aqueous sodium – bicarbonatate, CO2 is liberated. The "C" of CO2 comes from (a) methyl group (b) carboxylic acid group (c) methylene group (d) bicarbonate CHOOSE THE CORRECT ANSWER

76 75. Carboxylic acids are more acidic than phenol and alcohol because of (a) inter molecular hydrogen bonding (b) formation of dimers (c) highly acidic hydrogen (d) greater resonance stabilisation of their conjugate base CHOOSE THE CORRECT ANSWER

77 76. Among the following the strongest acid is (a) ClCH 2 COOH (b) Cl 3 CCOOH (c) CH 3 COOH (d) Cl 2 CHCOOH CHOOSE THE CORRECT ANSWER

78 77. Which of the following compound is optically active ? (a) CH 3 CH 2 COOH (b) HOOC–CH 2 –COOH (c) CH 3 CH(OH)COOH (d) Cl 2 CHCOOH CHOOSE THE CORRECT ANSWER

79 78. CH 3 CH(OH)COOH ? The product is (a) CH 3 COCOOH (b) CH 3 CH 2 COOH (c) CH 3 CHOHCHO (d) COOHCH 2 COOH CHOOSE THE CORRECT ANSWER

80 79. The compound found in some stony deposit in kidneys is (a) potassium oxalate (b) oxalic acid (c) potassium succinate (d) calcium oxalate CHOOSE THE CORRECT ANSWER

81 80. Ethylene cyanide on hydrolysis using acid gives (a) oxalic acid (b) succinic acid (c) adipic acid (d) propionic acid CHOOSE THE CORRECT ANSWER


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