NEET Chemistry - New - Alcohols, Phenols and Ethers

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Question - 1

The compound A on treatment with Na gives B, and with PCl5 gives C. B and C react together to give diethyl ether. A, B and C are in the order:

  • A C2H5Cl, C2H6, C2H5OH
  • B C2H5OH, C2H5Cl, C2H5ONa
  • C C2H5OH, C2H6, C2H5Cl
  • D C2H5OH, C2H5ONa, C2H5Cl

Question - 2

Compound A, C8H10O, is found to react with NaOI (produced by reacting Y with NaOH) and yields a yellow precipitate with characteristic smell. A and Y are respectively.

  • A
  • B
  • C
  • D

Question - 3

Which of the following reaction(s) can be used for the preparation of alkyl halides?
(I) CH3CH2OH + HCI \(\underrightarrow { { anh.ZnCl }_{ 2 } } \)
(II) CH3CH2OH + HCI ⟶
(III) (CH3)3COH + HCI ⟶
(IV) (CH3)2CHOH + HCI \(\underrightarrow { { anh.ZnCl }_{ 2 } } \) 

  • A (I) and (II) only
  • B (IV) only
  • C (III) and (IV) only
  • D (I), (III) and (IV) only

Question - 4

In the following sequence of reactions
CH3 - Br \(\underrightarrow { KCN } \) A \(\underrightarrow { H_{ 3 }{ O }^{ + } } \) B \(\underrightarrow { LiAlH_{ 4 } } \) C the end product (C) is:

  • A acetone
  • B methane
  • C acetaldehyde
  • D ethyl alcohol

Question - 5

In the following reactions:
(i) \({ CH }_{ 3 }-\overset { \underset { | }{ { CH }_{ 3 } } }{ CH } -\underset { \overset { | }{ OH } }{ CH } -{ CH }_{ 3 }\quad \underline { { H }^{ + }/heat } \)
(ii)                                       \(\left[ \overset { A }{ Major\\ product } \right] ^{ + }{ \downarrow }\left[ \overset { B }{ Minor\\ product } \right] \)
            \(A\overset { HBr,\quad dark }{ \underset { inabsenceofperoxide }{ \longrightarrow } } \left[ \overset { C }{ Major\\ product } \right] ^{ + }{ \downarrow }\left[ \overset { D }{ Minor\\ product } \right] \)
The major products (A) and (C) are respectively:

  • A \({ CH }_{ 2 }=\overset { \underset { | }{ { CH }_{ 3 } } }{ C } -{ CH }_{ 2 }-{ CH }_{ 3 }\quad and\quad \underset { \overset { | }{ Br } }{ { CH }_{ 2 } } -\overset { \underset { | }{ { CH }_{ 3 } } }{ CH } -{ CH }_{ 2 }-{ CH }_{ 3 }\)
  • B \({ CH }_{ 3 }-\overset { \underset { | }{ { CH }_{ 3 } } }{ C } -{ CH }-{ CH }_{ 3 }\quad and\quad { CH }_{ 3 }-\overset { \underset { | }{ { CH }_{ 3 } } }{ \underset { \overset { | }{ Br } }{ C } } -{ CH }_{ 2 }-{ CH }_{ 3 }\)
  • C \({ CH }_{ 2 }=\overset { \underset { | }{ { CH }_{ 3 } } }{ C } -{ CH }_{ 2 }-{ CH }_{ 3 }\quad and\quad { CH }_{ 3 }-\overset { \underset { | }{ { CH }_{ 3 } } }{ CH } -\underset { \overset { | }{ Br } }{ CH } -{ CH }_{ 3 }\)
  • D \({ CH }_{ 3 }-\overset { \underset { | }{ { CH }_{ 3 } } }{ CH } ={ CH }-{ CH }_{ 3 }\quad and\quad { CH }_{ 3 }-\overset { \underset { | }{ { CH }_{ 3 } } }{ \underset { \overset { | }{ BR } }{ C } } -C{ H }_{ 2 }-{ CH }_{ 3 }\)

Question - 6

Following compounds are given:
(i) CH3CH3OH (ii) CH3COCH3  (iii) \({ CH }_{ 3 }-\underset { \overset { | }{ { CH }_{ 3 } } }{ CHOH } \) (iv) CH3OH
Which of the above compound(s), on being warmed with iodine solution and NaOH, will give iodoform?

  • A (i), (iii) and (iv)
  • B Only (ii)
  • C (i), (ii) and (iii)
  • D (i) and (ii)

Question - 7

When glycerol is treated with excess of HI, it produces:

  • A 2-iodopropane
  • B allyl iodide
  • C propene
  • D glycerol triiodide

Question - 8

Match the compounds given in List I with their characteristic reactions given in List II. Select the correct option.
 

List I
(Compounds)		 List II
(Reactions)
(a) CH3(CH2)2NH2 (i) Alkaline hydrolysis
(b) CH3C ≡ CH (ii) With KOH (alcohol) and CHCl3 produces bad smell
(c) CH3CH2COOCH3 (iii) Gives white ppt. with ammoniacal AgNO3
(d) CH3CH(OH)CH3 (iv) With Lucas reagent cloudiness appears after 5 minutes

 

  • A a-(ii), b-(i), c-(iv), d-(iii)
  • B a-(iii), b-(ii), c-(i), d-(iv)
  • C a-(ii), b-(iii), c-(i), d-(iv)
  • D a-(iv), b-(ii), c-(iii), d-(i)

Question - 9

Consider the following reaction:
\(Ethanol\quad \underrightarrow { { PBr }_{ 3 } } X\underrightarrow { alc.KOH } Y\xrightarrow [ (i){ H }_{ 2 }{ SO }_{ 4 } ]{ { (ii)H }_{ 2 }O,heat } Z\)

  • A CH3CH2 O - CHz - CH3
  • B CH3 - CH2 - SO3H
  • C CH3CH2OH
  • D CH2 = CH2

Question - 10

HOCH2.CH2OH on heating with per-iodic acid gives:

  • A 2HCOOH
  • B CHO | CHO
  • C
  • D 2CO2
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