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CBSE Questions for Class 12 Engineering Chemistry Alcohols,Phenols And Ethers Quiz 14 - MCQExams.com

Dehydration of methyl alcohol gives:
  • Methane
  • Ethane
  • Methyl hydrogen sulphate
  • Dimethyl ether
The organic products formed in the reaction, C6H5COOCH3LiAlH4,H+ are
  • C6H5CH2OH and CH3OH
  • C6H5COOH and CH4
  • C6H5CH3 and CH3OH
  • C6H5CH3 and CH4
Which of the following can work as dehydrating agent for alcohols?
  • H2SO4
  • Al2O3
  • H3PO4
  • All of these
Alcohol can be prepared by which of the following methods?
  • By hydration of alkene
  • By reduction of carbonyl compounds
  • By reaction of primary aliphatic amines with nitrous acid
  • By hydrolysis of esters
When reaction undergoes dehydration reaction in presence of concentrated H2SO4 then what will be the major product?
1725116_c532eb9a7f6b42438672b62bc3f22ab3.png
Which of the following will react with NaOH to form methanol as a major product?
  • (CH3)N+I
  • (CH3)3S+I
  • (CH3)3CCl
  • CH3OCH3
In which case first has higher solubility than second?
(I) Phenol, Benzene
(II) Nitrobenzene, Phenol
(III) o-Hydroxybenzaldehyde, p-Hydroxy benzaldehyde
(IV) Ethanal, Dimethylether
(V) o-Nitrophenol, p-Nitrophenol
  • only I
  • III,V
  • I,IV
  • I,IV
Anisole is the product obtained from phenol by the reaction known as
  • Coupling
  • Etherification
  • Oxidation
  • Esterification

Which of the following are correct statements?

1747482_8363b539aa5a409eb375f3d38a0a929e.png
  • Both the ethers obtained by the two routes have opposite but equal optical rotation.
  • One of the ether is obtained as a racemic mixture
  • Step II and III both are S2N reaction and both have inversion.
  • Step II has inversion but step III has retention

The product is :
1748536_cf6254c9f328441aa9691dd44c37c026.png
  • None
To remove last traces of water from alcohol, the metal used is
  • Sodium
  • Potassium
  • Calcium
  • Aluminium
An organic compound (X) with molecular formula C7H8O is insoluble in aqueous NaHCO3 but dissolves in NaOH. When treated with bromine water (X) rapidly gives (Y), C7H5OBr3. The compound (X) and (Y) respectively are
  • Benzyl alcohol and 2,4,6tribromo3methoxy benzene
  • Benzyl alcohol and 2,4,6tribromo3methoxy phenol
  • ocresol and 3,4,5tribromo2methyl phenol
  • Methoxy benzene and 2,4,6tribromo3methoxy benzene
  • mcresol and 2,4,6tribromo3methyl phenol
Which of the following reactions will yield propan-2-ol?
  • H2C=CHCH3+HOHH+
  • CH3CHOCH3MgBrHOH
  • CH2O(i)C2H5MgI(II)HOH
  • H2C=CHCH3NeutralKMnO4
Which of the following compound/s have some solubility in water?
IUPAC name of the compound is
1761084_fc9522e4e5cb425da81a54013f782b0a.jpg
  • 4ethyl2pentanol
  • 5methyl2hexanol
  • 2ethyl2pentanol
  • 3methyl2hexanol
IUPAC name of the given compound is
1761833_4cc83afdfb4944c3979a3533263dcbf0.png
  • 1chloro 4methyl2hexanol
  • 1chloro 4ethyl2pentanol
  • 1chloro 4methyl2hexanol
  • 1chloro 2hydroxy4methyl hexanol
IUPAC name of the compound
CH2=CHCH2CH2OH is
  • 1buten4ol
  • 3buten1ol
  • 4hydroxy-1butene
  • 1butene4ol
The IUPAC name of CH3CHBrCH2OH is
  • 3hydroxy 2bromopropane
  • 2bromopropan1ol
  • 2bromo-3-propanol
  • 3hydroxy isopropyl bromide
The name of H3CCHCHCH3||CH3OH


The IUPAC nomenclature is:
  • Butanol
  • 2methyl butanol-3
  • 3methyl butan 2-ol
  • Pentanol
The IUPAC name of (C2H5)2CHCH2OH is
  • 2-ethyl-1-butanol
  • 2-methyl-1-pentanol
  • 2-ethyl-1-pentanol
  • 3-ethyl-1-butanol
The IUPAC name of the compound CH3C=CH2CH2OH|CH3 is
  • 2methyl2butenol
  • 2methyl3butenol
  • 3methyl2butenol
  • 2methyl byt-2enol
The IUPAC name of the compound CH3CHCH2CH2OH|CH3 is
  • 1-pentanol
  • Pentanol
  • 2-methyl-4-butanol
  • 3-methyl-1-butanol
The compound which gives the most stable carbonium on dehydrogenation
  • CH3CH|CH3CH2OH
  • CH3CH3|C|CH3OH
  • CH3CH2CH2CH2OH
  • CH3CH|CH3CH2CH3
An organic compound X on treatment with acidified K2Cr2O7 gives a compound Y which reacts with I2 and sodium carbonate to form tri-iodomethane. The compound X is 
  • CH3OH
  • CH3COCH3
  • CH3CHO
  • CH3CH(OH)CH3
The reagent used for the dehydration of an alcohol is 
  • Phosphorus pentachloride
  • Calcium chloride
  • Aluminium oxide
  • Sodium chloride
Sodium ethoxide is a specific reagent for
  • Dehydration
  • Dehydrogenation
  • Dehydrohalogenation
  • Dehalogenation
Dehydrogenation of gives
1763367_0f6db15de9804aae99803c5ca9c41d31.png
  • Acetone
  • Acetaldehyde
  • Acetic acid
  • Acetylene
Propene, CH3CH=CH2 can be converted to l-propanol by oxidation. Which set of regents among the following is ideal to effect the conversion 
  • Alkaline KMnO4
  • B2H6 and alkaline H2O2
  • O3 /Zn dust
  • OsO4/CH4,CL2
Which of the following statements is correct regarding case of  dehydration in alcohols?
  • Primary > Secondary
  • Secondary > Tertiary
  • Tertiary > Primary
  • None of these
Commercially methanol is prepared by
  • Reduction of CO in presence of ZnO.Cr2O3
  • Methane reacts with water vapours at 900 oC in presence of Ni catalyst
  • Reduction of HCHO by LiAlH4
  • Reduction of HCHO by aqueous NaOH
The reaction, water gas (CO+H2)+H2 673K,300 atmosphere in presence of the catalyst Cr2O3/ZnO is used for the manufacture of 
  • HCHO
  • HCOOH
  • CH3OH
  • CH3COOH
Phenol at 250c is 
  • A white crystalline solid
  • A transparent liquid
  • A gad
  • yellow solution
In which case methyl-t-butyl ether is formed
  • (C2H5)3CONa+CH3Cl
  • (CH3)3CONa+CH3Cl
  • (CH3)3CONa+C2H5Cl
  • (CH3)3CONa+CH3Cl
The best method to prepare cyclohexene from cyclohexanol is by using 
  • Conc. HCl + ZnCl
  • Conc. H3PO4
  • HBr
  • Conc. HCl
Ether which is liquid at room temperature is
  • C2H5OCH3
  • CH3OCH3
  • C2H5OC2H5
  • None of these
The compound which gives the most stable carbonium ion on dehydration is 
In which of the following reaction, phenol or sodium phenoxide is not formed:
  • C6H5N+2Cl+alc.KOH
  • C6H5OCl+NaOH
  • C6H5OCl+aq.NaOH
  • C6H5N+2Cl H2OΔ
The reaction shown is the example of:
1765757_e510602fa25549eba7b88f165e093b52.png
  • Sulphonation
  • Dehydration
  • Alkylation
  • Decomposition
Isopropyl alcohol is obtained by reacting which of the following alkenes with conc. H2SO4 and H2O
  • Ethylene
  • Propylene
  • 2-methyl propene
  • Isoprene
Maximum solubility of alcohol in water is due to
  • Covalent bond
  • Ionic bond
  • H-bond with H2O
  • None of the above
Which will dehydrate easily?
  • 3-methyl-2-butanol
  • Ethyl alcohol
  • 2-methyl propane-2-ol
  • 2-methyl butanol
Which of the above paths is/are feasible for the preparation of ether(E)?
1769103_5e27014f14cd49318f7846200b10ac38.png
  • Path I is feasible.
  • Path II is feasible.
  • Both paths are feasible.
  • None is feasible.
The product of acid catalyzed hydration of 2-phenyl propene is
  • 3-phenyl-2-propanol
  • 1-phenyl-2-propanol
  • 2-phenyl-2-propanol
  • 2-phenyl-1-propanol
Propylene on hydrolysis with sulphuric acid forms
  • n-propyl alcohol
  • Isopropyl alcohol
  • Ethyl alcohol
  • Butyl alcohol
The only alcohol that can be prepared by the indirect hydration of alkene is
  • Ethyl alcohol
  • Propyl alcohol
  • Isobutyl alcohol
  • Methyl alcohol
Ethyl hydrogen sulphate is obtained by the reaction of H2SO4 on
  • Ethylene
  • Ethane
  • Ethyl chloride
  • Ethanol
The products (A) and (B) are:
1771512_d61d7b776ad94e138f6de98cdfd73907.png
Which of the following is the best synthesis of the ether (A) shown below:
1770554_918013e5f9314b3ca82fe514d086584d.png
  • PhOPHHNO3+H2SO4(Dinitration)
Monochlorination of toluene in sunlight followed by hydrolysis with aq. NaOH yields.
  • o-Cresol
  • m-Cresol
  • 2, 4-Dihydroxytoluene
  • Benzyl alcohol
Which of the following reactions will yield phenol?
0:0:3


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