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CBSE Questions for Class 12 Engineering Chemistry Alcohols,Phenols And Ethers Quiz 13 - MCQExams.com

The correct order of acidity for the following compound is 
1393462_2ad885c0e1b640f1bf83aa30206c5a29.PNG
  • I > II > III > IV
  • III > I > II > IV
  • III > IV > II > I
  • I > III > IV > II
Correct name of the given compound is
1406957_c191058d45204105bd953fb07cf321ab.png
  • (2R,3E)4-bromo pentan-2-ol
  • (2S,3E)4-bromo pentan-2-ol
  • (2R,3Z)4-bromo pentan-2-ol
  • (2S,3Z)4-bromo pentan-2-ol
In the dehydration reaction , 18O will be in 
1420850_729429cd87b24e29a4308278df53ab36.JPG
  • H2O
  • A
  • Both (A) and (B)
  • None of these
Correct order of basic strength:
  • CH3NH2>CH3NH3>CH3NH
  • OH>CH3CO2>Cl
  • CH3NH2>CH3NH3>CH3CH2NH
  • CH3CH2NH2>CH2=CHNH2>HCCNH
The correct IUPAC nomenclature for the following alcohol is:
1471805_99eb5fb72d2f45998cfe476452c34e00.JPG
  • 2-ethyl-2 butanol
  • 3-methyl-3 pentanol
  • 3-ethyl-3-methyl-3 pentanol
  • 1,1 -diethylene
Which of the following is represented by general formula CnH2n+2O?
  • Alcohols only
  • Both alcohols and ethers
  • Aldehydes only
  • Both aldehydes and ketones
(a)SecondaryalcoholH3PO4Δ

(b)TertiaryalcoholH3PO4Δ
For the above dehydration reaction rate of reaction will be:
  • a > b
  • a < b
  • a = b 
  • None
The major product is:
1489681_e1b28563d20f4c5ebed50fe3e7fe7343.png
Identify:
1493187_f44c45eaa7ca40fb87ac0ecbdfaedd37.png
Which of the following is dehydrated most easily? 
Which one has minimum % of enol content?
Alkyl halides can be converted to ethers through:
  • Frankland reaction
  • Williamson synthesis
  • Fitting reaction
  • Grignard reaction
What is the major product A?
1501665_66e27a59261946a7b9299069221736be.PNG
Dehydration of alcohol to alkene involves all the steps, except:-
  • combination with proton
  • formation of cabonium ion by removal of water molecule
  • loss of proton from carbonium ion from the β-position
  • loss of proton from carbonium iron from α-position
The IUPAC name of 
1509977_e7e0eddc908344c9a95d6bb030665024.jpg
figure 
1502864_78e2e8dff47d40f3949b83b35d5bc285.PNG
  • None of these
Which of the following is the best set of reagents to perform the above conversion? 
1508177_9faa90cfabb241a58edbb6c9844b41a9.PNG
  • ThO2,Δ
  • H3PO4,Δ
  • conc.H2SO4,Δ
  • Al2O3,Δ
Major product of the following reaction is 
1509346_7ce7f6fe8943464b979e07182c7ff0e3.PNG
Which of the following will be the correct product of reaction?
1518041_33b47f565d1542ac9669482170847122.png
The major product in the acid catalysed dehydration of 2-pentanol is 
  • Pent-1-ene
  • Pent-2-ene
  • Pent-3-ene
  • Methylbut-1-ene
The IUPAC name of 
1509978_c0aba69af149482b801b19898d6a2318.jpg
Propene is subjected to acidic hydration and hydroboration oxidation in two different experiments. The products obtained respectively are
  • n-propyl alcohol, n-propyl alcohol
  • isopropyl alcohol, isopropyl alcohol
  • n-propyl alcohol, isopropyl alcohol
  • isopropyl alcohol, n-propyl alcohol
What is the reagent used and appropriate temperature required to prepare ethene from ethyl alcohol?
  • Dilute H2SO4,160C
  • Concentrated H2SO4,170C
  • Dilute HCl,170C
  • Concentrated HCl,160C
Which of the following is most reactive toward acid catalyzed dehydration? 
Which of the following is most acidic?
  • CH3OH
  • CH3CH2OH
  • (CH3)2CHOH
  • (CH3)3COH
The sum of locants of the compound is _________
1566182_f2a5f156be59458aad990e9db49f9d21.PNG
  • 10
  • 8
  • 9
  • 7
Examine the following structures:-
(A) (CH3)3COH
(B) (CH3)3CNH2
Which of the following statement is correct ?
  • A is tertiary alcohol while B is tertiary amine.
  • A is primary alcohol while B is primary amine.
  • A is tertiary alcohol while B is primary amine.
  • A is primary alcohol while B is tertiary amine.
In the following reaction A and B respectively are
1559304_0732956755bc44f79d77a30dc0c40e49.JPG
  • 3 and 1 alcohols
  • 3 and 2 alcohols
  • Both 2 alcohols
  • 2 and 1 alcohols
Which of these dehydrates most readily when reacts with conc.H2PO4
.
1547149_4362882c4e064ebd952fe44464c934ae.png
  • both A and B will form
IUPAC name of compound 'X' is 
1597064_7084fcfad91e45b69427d7f2d574ce5f.jpg
  • Cyclohex -1- en -3-ol
  • Cyclohex -2-en-1-ol
  • Cyclohex-5-en-2-ol
  • Cyclohex-5-en-1-ol
The IUPAC name of
1607498_61a4c2cbefbe4d74bf1dfee07a0f08d1.PNG
  • 1-ethoxypropane-2-ol
  • 3-ethoxypropane-2-ol
  • 1-ethoxy-2-hydroxy propane
  • None of these
Compound(Refer Image)Conc.H2SO4

The major product obtained in the above reaction is:
1528534_d3e3dee3b51c4f61838708001dfd160d.PNG
When vapours of methyl alcohol are passed under pressure over heated Al2O3 at 250oC, the product obtained is: 
  • dimethyl ether
  • ethyl methyl ether
  • diethyl ether
  • none of these
In the following compounds phenol (I) p-cresol (II) m-nitrophenol (III) and  p-nitrophenol (IV) the order of acidity is:
  • III > IV > I > II
  • I > IV > III > II
  • II > I > III > IV
  • IV > III > I > II
Which is dehydrated to a maximum extent using conc.H2SO4?
Cyclopentanol on reaction with NaH followed by CS2 and CH3I produces a/an:
  • ketone
  • alkene
  • ether
  • xanthate
Heating together of sodium ethoxide and ethyl iodide will give :
  • ethyl alochol
  • acetadehyde
  • diethyl ether
  • acetic acid
Dehydration of alcohol involves:
  • free radical
  • carbocation
  • carbanion
  • carbene
Which of the following pairs of reagents will not form ether? 
  • C2H5Br+CH3COONa
  • C2H5Br+C2H5ONa
  • C2H5Br+(CH3)2CHONa
  • (CH3)2CHBr+CH3ONa
 Main product(s) of the reaction is/are: 
1719549_5bf974247066497fb3a0c19b8fddb820.JPG
  • CH3COOH+H2
  • CH3CH2COOH
  • CH3CH(OH)CH3
  • CH3CH2OH
Ether form peroxide in contact with air and light and it may cause explosion, since the boiling point of peroxide is: 
  • equal to ether
  • lower than ether
  • higher than ether
  • none of these
State whether the following statement is True or False.
Primary alcohols are dehydrated easily than secondary and teritary alcohols.
  • True
  • False
State, whether the following statements are True or False:
2-Aminoethanol is formed when ethylene oxide combines with ammonia.  
  • True
  • False
State, whether the following statements are True or False:
Ethers are more polar than the isomeric alcohols.
  • True
  • False
 Which of the following reactions will give good yield of ether? 
An ether is more volatile than an alcohol having the same molecular formula, This is due to: 
  • dipolar character of ethers
  • alcohols having resonance structures
  • intermolecular hydrogen bonding in ethers
  • intermolecular hydrogen bonding in alcohols
Which of the following will be most easily dehydrated in acidic conditions? 
Identify (Z) in the series, C3H7OHConc.H2SO4170oC(X)Br2(Y)ExcessofAlc.KOH(Z)
  • CH3CCH
Tert- butyl alcohol is:
  • 2-methyl propan-2-ol
  • 2-methyl propan-1-ol
  • 3-methyl butan-1-ol
  • 3-methyl butan-2-ol
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