NEET AIPMT Chemistry Chapter Wise Solutions - Alcohols, Phenols and Ethers

NEET AIPMT Chemistry Chapter Wise Solutions – Alcohols, Phenols and Ethers

Contents

NEET AIPMT Chemistry Chapter Wise Solutions Physics Biology

1. The heating of phenyl methyl ether with HI produces (NEET 2017)
(a) iodobenzene
(b) phenol
(c) benzene
(d) ethyl chloride.

2. Which one is the most acidic compound? (NEET 2017)

3.The reaction

can be classified as (NEET-I 2016)
(a) dehydration reaction
(b) Williamson alcohol synthesis reaction
(c) Williamson ether synthesis reaction
(d) alcohol formation reaction.

4. Reaction of phenol with chloroform in presence of dilute sodium hydroxide finally introduces which one of the following functional group?(2015)
(a) -COOH
(b) -CHCl₂
(c) -CHO
(d) -CH₂Cl

5. Which of the following reaction(s) can be used for the preparation of alkyl halides?
(I) CH₃CH₃OH + HCl —Anh,ZnCl₂—->
(II) CH₃CH₃OH + HCl —–>
(III) (CH₃)₃COH + HCl —–>
(IV) (CH₃)₂CHOH + HCl—Anh,ZnCl₂—->
(a) (I) and (II) only
(b) (IV) only
(c) (III) and (IV) only
(d) (I), (III) and (IV) only

6. The reaction,

is called (2015, Cancelled)
(a) Etard reaction
(b) Gattermann-Koch reaction
(c) Williamson synthesis
(d) Williamson continuous etherification process.

7. Among the following sets of reactants which one produces anisole? (2014)
(a) CH₃CHO ; RMgX
(b) C₆H₅OH ; NaOH ; CH₃I
(c) C₆H₅OH ; neutral FeCl₃
(d) C₆H₅CH₃; CH₃COCl; AlCl₃

8. Which of the following will not be soluble in sodium hydrogen carbonate? (2014)
(a) 2,4,6-Trinitrophenol
(b) Benzoic acid
(c) o-Nitrophenol
(d) Benzenesulphonic acid

9. Among the following ethers, which one will produce methyl alcohol on treatment with hot concentrated HI? (NEET 2013)

10. Number of isomeric alcohols of molecular formula C₆H₁₄0 which give positive iodoform test is (Karnataka NEET 2013)
(a) three
(b) four
(c) five
(d) two

11. In the following sequence of reactions

ether the end product (C) is (2012)
(a) acetone
(b) methane
(c) acetaldehyde
(d) ethyl alcohol

12. Which of the following compounds can be used as antifreeze in automobile radiators? (Mains 2012)
(a) Methyl alcohol
(b) Glycol
(c) Nitrophenol
(d) Ethyl alcohol

13. In the following reactions, (2011)

14. Given are cyclohexanol (I), acetic acid (II), 2,4,6-trinitrophenol (III) and phenol (IV). In these the order of decreasing acidic character will be ( 2010)
(a) III > II > IV > I
(b) II > III > I > IV
(c) II > III > IV > I
(d) III > IV > II > I

15. Which of the following compounds has the most acidic nature? (2010)

16. Among the following four compounds
(i) Phenol
(ii) Methyl phenol
(iii) Meta-nitrophenol
(iv) Para-nitrophenol
The acidity order is (2010)
(a) (iv) > (iii) > (i) > (ii)
(b) (iii) > (iv) > (i) > (ii)
(c) (i) > (iv) > (iii) > (ii)
(d) (ii) > (i) > (iii) > (iv)

17. When glycerol is treated with excess of HI, it produces (Mains 2010)
(a) 2-iodopropane
(b) allyl iodide
(c) propene
(d) glycerol triiodide

18. Following compounds are given

Which of the above compound(s), on being warmed with iodine solution and NaOH, will give iodoform? (Mains 2010)
(a) (i), (iii) and (iv)
(b) Only (ii)
(c) (i), (ii) and (iii)
(d) (i) and (ii)

19. Match the compounds given in List I with their characteristic reactions given in List II. Select the correct option. (Mains 2010)

20. Consider the following reaction: (2009)

21. HOCH₂ CH₂OH on heating with periodic acid gives (2009)

22. Consider the following reaction: (2009)

(a) benzaldehyde
(b)benzoic acid
(c) benzene
(d)toluene

23. In the reaction:

Which of the following compounds will be formed? (2007)

24. The general molecular formula, which represents the homologous series of alkanols is (2006)
(a) C_nH_2n+20
(b) C_nH_2n0₂
(c) C_nH_2nO
(d) C_nH_2n+1o

25. Ethylene oxide when treated with Grignard reagent yields (2006)
(a) primary alcohol
(b) secondary alcohol
(c) tertiary alcohol
(d) cyclopropyl alcohol.

26. The major organic product in the reaction is (2006)

27. Which one of the following compounds is most acidic? (2005)

28. Which one of the following will not form a yellow precipitate on heating with an alkaline solution of iodine? (2004)
(a) CH₃CH(OH)CH₃
(b) CH₃CH₂CH(OH)CH₃
(c) CH₃OH
(d) CH₃CH₂OH

29. n-propyl alcohol and isopropyl alcohol can be chemically distinguished by which reagent (2002)
(a) PCl₅
(b) reduction
(c) oxidation with potassium dichromate
(d) ozonolysis.

30. When phenol is treated with CHCl₃ and NaOH, the product formed is (2002)
(a) benzaldehyde
(b) salicylaldehyde
(c) salicylic acid
(d) benzoic acid.

31. Which of the following is correct? (2001)
(a) On reduction, any aldehyde gives secondary alcohol.
(b) Reaction of vegetable oil with H₂S0₄ gives glycerine.
(c) Alcoholic iodine with NaOH gives iodoform.
(d) Sucrose on reaction with NaCl gives invert sugar.

32. Iodoform test is not given by (1998)
(a) ethanal
(b) ethanol
(c) 2-pentanone
(d) 3-pentanone

33. (1998)

34. Which one of the following compounds is resistant to nucleophilic attack by hydroxyl ions? (1998)
(a) Diethyl ether
(b) Acetonitrile
(c) Acetamide
(d) Methyl acetate

35. When 3,3-dimethyl-2-butanol is heated with H₂S0₄, the major product obtained is (1995)
(a) 2,3-dimethyl-2-butene
(b) cis and trans isomers of 2,3-dimethyl-2-butene
(c) 2,3-dimethyl-1-butene
(d) 3,3-dimethyl-1-butene.

36. On heating glycerol with cone. H₂S0₄, a compound is obtained which has bad odour. The compound is (1994)
(a) acrolein
(b) formic acid
(c) allyl alcohol
(d) glycerol sulphate.

37. The compound which does not react with sodium is (1994)
(a) CH₃COOH
(b) CH₃CHOHCH₃
(c) C₂H₅OH
(d) CH₃OCH₃

38. Ethanol and dimethyl ether form a pair of functional isomers. The boiling point of ethanol is higher than that of dimethyl ether, due to the presence of (1993)
(a) H-bonding in ethanol
(b) H-bonding in dimethyl ether
(c) CH₃ group in ethanol
(d) CH₃ group in dimethyl ether.

39. Increasing order of acid strength among p-methoxyphenol, p-methylphenol and p-nitrophenol is (1993)
(a) p-nitrophenol, p-methoxyphenol, p-methylphenol
(b) p-methylphenol, p-methoxyphenol, p-nitrophenol
(c) p-nitrophenol, p-methylphenol, p-methoxyphenol
(d) p-methoxyphenol, p-methylphenol, p-nitrophenol.

40. Which one of the following on oxidation gives a ketone? (1993)
(a) Primary alcohol
(b) Secondary alcohol
(c) Tertiary alcohol
(d) All of these.

41. What is formed when a primary alcohol undergoes catalytic dehydrogenation? (1993)
(a) Aldehyde
b) Ketone
(c) Alkene
(d) Acid

42. When hydrochloric acid gas is treated with propene in presence of benzoyl peroxide, it gives (1993)
(a) 2-chloropropane
(b) allyl chloride
(c) no reaction
(d) n-propyl chloride.

43. How many isomers of C₅H₁₁OH will be primary alcohols? (1992)
(a) 5
(b) 4
(c) 2
(d) 3

44. Methanol is industrially prepared by (1992)
(a) oxidation of CH₄ by steam at 900°C
(b) reduction of HCHO using LiAIH₄
(c) reaction HCHO with a solution of NaOH
(d) reduction of CO using H₂ and Zn0-Cr₂0₃.

45. HBr reacts fastest with (1992)
(a) 2-Methylpropan-1-ol
(b) Methylpropan-2-ol
(c) propan-2-ol
(d) propan-1-ol.

46. When phenol is treated with excess bromine water. It gives (1992)
(a) m-bromophenol
(b) o-and p-bromophenols
(c) 2,4-dibromophenol
(d) 2,4,6-tribromophenol.

47. The compound which reacts fastest with Lucas reagent at room temperature is (1989)
(a) butan-1-ol
(b) butan-2-ol
(c) 2-methylpropan-1-ol
(d) 2-methylpropan-2-ol.

48. Which one of the following compounds will be most readily attacked by an electrophile? (1989)
(a) Chlorobenzene
(b) Benzene
(c) Phenol
(d) Toluene

49. Propene, CH₃CH=CH₂ can be converted into 1-propanol by oxidation. Indicate which set of reagents amongst the following is ideal for the above conversion? (1989)
(a) KMn0₄ (alkaline)
(b) Osmium tetroxide (OsO₄/CH₂Cl₂)
(c) B₂H₆ and alk. H₂0₂
(d) 0₃/Zn.

50. Phenol is heated with CHCl₃ and aqueous KOH when salicylaldehyde is produced. This reaction is known as (1989,88)
(a) Rosenmund’s reaction
(b) Reimer-Tiemann reaction
(c) Friedel-Crafts reaction
(d) Sommelet reaction.

51. Lucas reagent is (1988)
(a) cone. HCl and anhydrous ZnCl₂
(b) cone. HN0₃ and hydrous ZnCl₂
(c) cone. HCl and hydrous ZnCl₂
(d) cone. HN0₃ and anhydrous ZnCl₂.