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CBSE Questions for Class 12 Medical Chemistry Alcohols, Phenols And Ethers Quiz 6 - MCQExams.com

(A) CH3C|CH3HCH2CH2OH
(B) CH3OH|C|CH3CH2CH3
(C) CH3CH3|CHOH|CHCH3
The order of given alkanols A,B,C  in their reactivity towards acid catalysed dehydration is:
  • A>B>C
  • B>A>C
  • B>C>A
  • C>B>A
Dehydration of the following in increasing order is:
773158_f790ce03ae684e8281261acd5bc9dc0a.png
  • I<II<III<IV
  • II<III<IV<I
  • I<III<II<IV
  • I<IV<II<III
The correct decreasing order of dehydration of following alcohols with conc. H2SO4 is:
874563_a300cdb3823d4346b9f6d9539a0a0279.png
  • C > A > B > D
  • D > A > C > B
  • A > B > C > D
  • D > C > A > B
Methylphenyl ether can be obtained by reacting :
  • phenolate ions and methyl iodide
  • methoxide ions and bromobenzene
  • methanol and phenol
  • bromo benzene and methyl bromide
The correct statements about squaric acid?

877196_ac6e7b9bf7fc43bc8b32da56d9dc614a.png
  • It is stronger acid than phenol
  • It can form two conjugate base
  • It can liberate CO2 from NaHCO3
  • The diconjugate base of squaric acid has all CC bond lengths are equal
Correct representation of 3- methylpent-3-en-2-ol is :
In the series of reaction,the product D is a/an :
879303_7d336c66357f4a759b945bafbd2feee6.png
  • Alcohol
  • Ketone
  • Aldehyde
  • Carboxylic acid
Which of the following is best method to prepare phenyl-t-butyl ether?
  • (CH3)3CONa++C6H5Br
  • C6H5ONa+(CH3)3CCl
  • (CH3)2C=CH2Hg(OCOCH3)2C6H5OHNaBH4
  • None of these
The best method to prepare 3-methylbutan-2-ol from 3-methylbut-1-ene is:
  • addition of water in presence of dil. H2SO4
  • addition of HCI followed by reaction with dil. NaOH
  • hydroboration - oxidation reaction
  • Reimer - Tiemann reaction.
Product of the above reaction is:
880766_d49079fa543141cf9db89bc84b6abc2f.png
A hydrocarbon A(C3H8) on treatment with chlorine in presence of sunlight yielded compound B as the major product. Reaction of B with aqueous KOH gave C which on treatment with concentrated H2SO4 yielded D. Hydrogenation of D gave back A. The sequence of reactions involved in the above conversion is:
  • Substitution, Substitution, Addition, Dehydration
  • Substitution, Substitution, Dehydration, Addition
  • Substitution, Dehydration, Addition, Addition
  • Addition, Substitution, Dehydration, Substitution
The correct IUPAC name of the compound is ?
928651_dfd29716a25f4b6192decc669a22230b.png
  • 2-ethyl-1-chlorocyclohexanol
  • 4-chloro-5-ethylcyclhexanol
  • 4-hydroxy-2-ethyl-1-chlorocycloheane
  • 4chloro-3-ethylcyclohexanol
Alcohols of low molecular weight are:
  • soluble in water
  • soluble in water on heating
  • insoluble in water
  • insoluble in all solvents.
IUPAC name of CH3CH2CH2CH|CH2OHCH2CH3 is:
  • 3 -propylbutan-1-ol
  • 2-Ethylpentan - 1 - ol
  • 3- methyl hydroxyhexane
  • 2- ethyl -2 - propyl ethanol
Consider the following reaction,
PhenolZndustXCH3Clanhyd.Alcl3YalkalineKMnO4Z
The product Z is:
  • benzaldehyde
  • benzoic acid
  • benzene
  • toluene
Which compound is the most soluble in water?
  • Chloroethane
  • Ethanol
  • Ethanal
  • Ethylene glycol
Which of the following alcohols is the least soluble in water?
  • Ethanol
  • 1-Propanol
  • 1-Butanol
  • 1-Pentanol
Which of the following statements is not correctly showing the trend of the properties mentioned ?
  • CH3CH2OH>CH3CH2CH2OH>CH3CH2CH2CH2OH(Solubility)
  • CH3CH2OH>CH3CH2CH2OH>CH3CH2CH2CH2OH(Boilingpoint)
  • CH3CH2CH2OH>CH3CH|CH3CH2OH>CH3CH3|C|CH3OHBoilingpoint
  • CH3CH3|C|CH3OH<CH3CH|CH3CH2OH <CH3CH2CHCH2OH
Which of the following has highest boiling point?
  • Benzene
  • Phenol
  • Toluene
  • Ethylbenzene
Vapours of an alcohol X when passed over hot reduced copper, produce an alkene, the alcohol is:
  • primary alcohol
  • secondary alcohol
  • tertiary alcohol
  • dihydric alcohol
Ether is obtained from ethyl alcohol in presence of H2SO4 at?
  • 113 K
  • 443 K
  • 413 K
  • 213 K
(CH3)3CCH2OHConc.H2SO41700C X
In the reaction , X is:
  • (CH3)2C=CHCH3
  • (CH3)2C=CH2
  • (CH3)2CHCH2CH3
  • CH3CH2C|CH3=CH2
Unlike phenol, 2,4-dinitrophenol is soluble in sodium carbonate solution in water because ?
  • presence of two - NO2 groups in the ring makes 2 , 4 - dinitrophenol a stronger acid than phenol.
  • presence of two - NO2 groups in the ring makes 2 , 4 - dinitrophenol a weaker acid than phenol.
  • presence of two NO2 groups make the hydrogen bonding easier, making 2 , 4-dinitrophenol soluble.
  • nitro group reacts with Na2CO3 while -OH group does not.
Which of the following synthesis given 3-methyl-1-hexanol?
  • 2BromohexaneMgdryether(i)HCHO(ii)H3O+
  • 3BromopentaneMgdryether(i)CH3CHO(ii)H3O+
  • 1BromobutaneMgdryether(i)CH3COCH3(ii)H3O+
An alcohol X on heating with concentrated H2SO4 gives an alkene Y which can show geometrical isomerism.The alcohol X is?
  • CH3CH2OCH3
  • CH3CH2CHO
  • CH3CH2CH2OH
  • CH3CH2CH(OH)CH3
Methyl alcohol is industrially prepared by the action of ?
  • CH3COCH3
  • CO+H2
  • CH3COOH
  • C2H5OH
Which of the following compounds will react with sodium hydroxide solution in water ?
  • C6H5OH
  • C6H5CH2OH
  • (CH3)3COH
  • C2H5OH
Give IUPAC name of the compound given below :
CH3C|ClHCH2CH2C|OHHCH3
  • 2- Chloro - 5 - hydroxyhexane
  • 2 - Hydroxy - 5 - chlorohexane
  • 5 - Chlorohexan - 2 - ol
  • 2 - Chlorohexan - 5 - ol
mixkBr+kBrO3 ( major)
1378655_64a8da13d1094c39a704351187e5116a.PNG
The order of reactivity of following alcohols with halogen acids is ______
(I) CH3CH2CH2OH 

(II) CH3CH2(CH3)CHOH

(III) 
CH3CH2CH3|C|CH3OH
  • (I) > (II) > (III)
  • (III) > (II) > (I)
  • (II) > (I) > (III)
  • (I) > (III) > (II)
The general formula for alcohol series is CnH2n+1OH. Which is the formula for alcohol contains four carbon?  
  • C5H11OH
  • C4H9OH
  • C4H8OH
  • C3H8OH
Compound C2H6O has two isomers X and Y. On reaction with HI, X gives alkyl iodide and water while Y gives alkyl iodide and alcohol.Compounds X and Y are respectively :
  • C2H5OC2H5andCH3OC2H5
  • CH3OCH3andC2H5OCH3
  • C2H5OHandCH3OCH3
  • CH3OHandCH3OCH3
Diethyl ether when refluxed with excess of HI gives two molecules of (i). Ethers can be most commonly prepared by reaction of (ii) and (iii) . The method is called (iv).
(i), (ii),(iii) and (iv) respectively are?
  • ethyl iodide, sodium alkoxide , alkyl halide, Williamson's synthesis
  • ethanol, alcohol , alkyl halide , substitution
  • methyl iodide, Grignard's reagent , alkyl halide , Williamson's synthesis
  • ethyl iodide, phenol, ethyl iodide, esterification
Based on above isomers answer the following.
Which isomers on dehydration with conc. H2SO4 give alkene which is capable to show geometrical isomerism?

991889_ad5fce8c290d4ea3842a60f168890e11.png
  • g, h, f
  • b, d, a
  • a, b, c.
  • None of these
The major product formed during the reaction of 1- methyl cyclopentene with CH3CO3H is:
Based on above isomers answer the following.
Which isomer on dehydration with conc. H3PO4 undergo maximum rearrangement?

991889_ad5fce8c290d4ea3842a60f168890e11.png
  • a
  • c
  • e
  • b
Cis-3-hexene (a) meso 3,4-hexanediol
trans-3-hexene (b) meso 3,4-hexanediol.
Choose pair of reagent (a, b) for above conversions.
  • Cold KMnO4,OsO4
  • Cold KMnO4,RCO3H/H3O
  • RCO3H/H3O,coldKMnO4
  • None of these
Reaction of R2butanol with ptoluenesulphonyl chloride in pyridine followed by reaction with LiBr gives:
  • R1butyl bromide
  • R2butyl tosylare
  • R1butyl tosylate
  • R2butyl bromide
Propene CH3CH=CH2 can be converted into 1-propanol by oxidation. Indicate which sets of reagents amongst the following is ideal to effect the above conversion?
  • KMnO4 (alkaline)
  • Osmimum tetroxide (OsO4/CH2Cl2)
  • B2H6 and alk H2O2
  • O3 and Zn/H2O
Product of the reaction is : 
989548_f3c8b3e162954ac2b64b8e1609684ebc.png
CH3CH2CH2CH2CH3|C|CH3CH2CH2OHH+Δ(A)(major)
Product (A) is:
  • CH3CH2CH2CH2C|CH3=CHCH3
  • CH3(CH2)3C(CH3)=C(CH3)2
  • CH3CH2CH2CH2C|CH3=CH2
  • CH3CH2CH|CH3CH2CH3|C=CH2
Trans - cyclohexane -1,2- diol can be obtained by the reaction of cyclohexene with :
  • KMnO4
  • OsO4
  • peroxy formic acid /H3O+
  • SeO2
Energy profile diagram for dehydration of 2-butanol using conc.H2SO4 is given below.
Product (b) of above reaction is :
990368_30d9f11b185645d083b23ba7d8df33d0.png
  • 1-butene
  • cis-2-butene
  • trans-2-butene
  • iso-butene
Product (Q) in this reaction is?
995536_b6922342d9274bc3b5ff124f20880ca2.png
Which of the following procedures would be best for the preparation of phenyl benzyl ether?
C6H5OCH2C6H5.
  • C6H5Cl+C6H5H2O()Na(+)
  • C6H5O()Na(+)+C6H5CH2Cl
  • 2C6H5Cl+Na2O
  • 2C6H5MgBr+CH2O
An organic compound having the molecular formula C8H10O on being heated with I2 and dilute NaOH gives a yellow precipitate. The expected compound is?
  • C6H5CH2CH2OH
Final product A is:
992354_2c594cf343d849829eb1fa66c9c3a1f3.png
  • CH2=C=CH2
Select the best method for the preparation of the following compounds :
993125_fbbd54ccb30f4528947e7d495987edb1.png
  • reaction of cyclohexanone with CH3Li
  • reaction of 1methylcyclohexene with Hg(OAc)2 followed by NaBH4
  • reaction of cyclohexene with BH4;NaOH/H2O2, followed by CH3Br
  • reaction of cyclohexene with MCPBA, followed by CH3MgBr
What is the product obtained by heating the following allylic ether of phenol?
995532_2d7000a702114469bda56322dbc4e8f7.png
The structure of the product formed in the reaction given below is :
993234_d3bd9f167c794655941be37e3650b79d.png
0:0:2


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