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 , $$^{18}O$$ will be in 
1420850_729429cd87b24e29a4308278df53ab36.JPG
  • $$H_2O$$
  • A
  • Both (A) and (B)
  • None of these
Correct order of basic strength:
  • $$C{ H }_{ 3 }N{ H }_{ 2 } > C{ H }_{ 3 }-\overset { \oplus }{ N } { H }_{ 3 }>C{ H }_{ 3 }-\overset { \circleddash }{ N } H$$
  • $$\overset { \circleddash }{ O } H > C{ H }_{ 3 }CO\overset { \circleddash }{ _2 } >C{ l }^{ \circleddash }$$
  • $$C{ H }_{ 3 }N{ H }_{ 2 } > C{ H }_{ 3 }-\overset { \oplus }{ N } { H }_{ 3 }>C{ H }_{ 3 }-CH_2-\overset { \circleddash }{ N } H$$
  • $$CH_{3}CH_{2}NH_{2} > CH_{2}=CH-NH_{2} > HC \equiv C-\overset{ \circleddash }{ N }H$$
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 $$C_{n} H_{2n + 2} O$$?
  • Alcohols only
  • Both alcohols and ethers
  • Aldehydes only
  • Both aldehydes and ketones
$$ (a)\quad Secondary\quad alcohol\quad \xrightarrow [ \Delta  ]{ H_{ 3 }PO_{ 4 } }  $$

$$ (b)\quad Tertiary\quad alcohol\quad \xrightarrow [ \Delta  ]{ H_{ 3 }PO_{ 4 } }  $$
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 $$ \beta $$-position
  • loss of proton from carbonium iron from $$ \alpha $$-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
  • $$ThO_{2},\Delta $$
  • $$H_{3}PO_{4},\Delta $$
  • $$conc.H_{2}SO_{4},\Delta $$
  • $$Al_{2}O_{3},\Delta $$
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 $$ H _ { 2 } S O _ { 4 } , 160 ^ { \circ } C $$
  • Concentrated $$ H _ { 2 } S O _ { 4 } , 170 ^ { \circ } C $$
  • Dilute $$ H C l , 170 ^ { \circ } C $$
  • Concentrated $$ H C l , 160 ^ { \circ } C $$
Which of the following is most reactive toward acid catalyzed dehydration? 
Which of the following is most acidic?
  • $${ CH }_{ 3 }OH$$
  • $${ CH }_{ 3 }{ CH }_{ 2 }OH$$
  • $$({ CH }_{ 3 })_{ 2 }CHOH$$
  • $$({ CH }_{ 3 })_{ 3 }COH$$
The sum of locants of the compound is _________
1566182_f2a5f156be59458aad990e9db49f9d21.PNG
  • 10
  • 8
  • 9
  • 7
Examine the following structures:-
$$(A)$$ $$(CH_3)_3C-OH$$
$$(B)$$ $$(CH_3)_3C-NH_2 $$
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.
  • $$ \mathrm{A} $$ is tertiary alcohol while $$ \mathrm{B} $$ is primary amine.
  • A is primary alcohol while $$ B $$ is tertiary amine.
In the following reaction A and B respectively are
1559304_0732956755bc44f79d77a30dc0c40e49.JPG
  • $${ 3 }^{ \circ }$$ and $${ 1 }^{ \circ }$$ alcohols
  • $${ 3 }^{ \circ }$$ and $${ 2 }^{ \circ }$$ alcohols
  • Both $${ 2 }^{ \circ }$$ alcohols
  • $${ 2 }^{ \circ }$$ and $${ 1 }^{ \circ }$$ alcohols
Which of these dehydrates most readily when reacts with conc.$${H}_{2}{PO}_{4}$$
.
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
$$Compound( Refer \ Image)\xrightarrow [ Conc.{ H }_{ 2 }{ SO }_{ 4 } ]{ \triangle  } $$

The major product obtained in the above reaction is:
1528534_d3e3dee3b51c4f61838708001dfd160d.PNG
When vapours of methyl alcohol are passed under pressure over heated $$Al_2O_3$$ at $$250^o C$$, 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.$$ H_2 SO_4 $$?
Cyclopentanol on reaction with NaH followed by $$CS_2$$ and $$CH_3I$$ 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? 
  • $$C_2H_5Br + CH_3COONa$$
  • $$C_2H_5Br + C_2H_5ONa$$
  • $$C_2H_5 Br + (CH_3 )_2 CHONa$$
  • $$(CH_3)_2CHBr + CH_3ONa $$
 Main product(s) of the reaction is/are: 
1719549_5bf974247066497fb3a0c19b8fddb820.JPG
  • $$ CH_3COOH+ H_2 $$
  • $$ CH_3CH_2COOH $$
  • $$ CH_3CH(OH)CH_3 $$
  • $$ CH_3CH_2OH $$
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, $$C_3H_7OH\overset{Conc. H_2SO_4}{\underset{170^oC}{\rightarrow}}(X)\overset{Br_2}{\rightarrow}(Y)\overset{Excess of}{\underset{Alc. KOH}{\rightarrow}}(Z)$$
  • $$CH_3-C\equiv CH$$
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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