The best method to prepare cyclohexene from cyclohexanol is by using:

  • conc. HCl + ZnCl2                     

  •   conc. H3PO4

  • HBr                                           

  • conc. HCl

Which of the following is most acidic?

  • p-cresol                               

  • p-chlorophenol

  • p-nitrophenol                       

  • p-aminophenol

Z→PCl5X→Alc.KOHY→2. H2O; boil1. Conc. H2SO4Z is:

  • CH3-CH2-CH2-OH

  •  CH3-C|H-CH3            OH

  • (C2H5)3C-OH

  • CH3-CH=CH2

The alkyl halide is converted into an alcohol by 

  • addition                           

  • substitution

  • dehydrohalogenation         

  • elimination

Glycerol on warming with excess of HI:

  • 2-iodopropane

  • 1-iodopropane

  • 1,2,3-tri-iodopropane

  • none of the above

Dehydrogenation of 2-butanol gives:

  • 2-Butene                                         

  • Butanone

  • Butyraldehyde                                 

  • 1-Butene

The compound having lowest boiling point among the following is -

  • Phenol                                 

  • o-Nitrophenol

  • m-Nitrophenol                       

  • p-Nitrophenol

Oxidation of 2-propanol by K2Cr2O7 and dilute H2SO4 leads to the formation of:

  • Propanal                     

  • Propanoic acid

  • Methanoic acid             

  • Propanone

The ionisation constant of phenol is higher than that of ethanol because -                   

  • Phenoxide ion is bulkier than ethoxide

  • Phenoxide ion is a stronger base than ethoxide

  • Phenoxide ion is stabilised through delocalisation

  • Phenoxide ion is less stable than ethoxide

Which represents Riemer-Tiemann reaction?
  • 1
  • 2
  • 3
  • 4

An organic compound A reacts with PCl3 to give B. The compound B with sodium metal in the presence of dry ether and gives n-butane. Thus, A and B are:

  • C2H5OH and C2H5Cl

  • C2H5Cl and C2H5ONa

  • C3H7OH and CH3CH2CH2OCl

  • C4H9OH and C4H9OCl

Compound that is not an alcohol-

  • C6H5OH

  • CH2=CHCH2OH                            

  • CH2OHCH2OH

  • C6H5CH2OH                                 

The boiling point of p-nitrophenol is higher than that of o-nitrophenol because -               

  • NO2 group at p-position behaves in a different way from that at o-position.

  • Intramolecular hydrogen bonding exists in p-nitrophenol.

  • There is intermolecular hydrogen bonding in p-nitrophenol.

  • p-Nitrophenol has a higher molecular weight than o-nitrophenol.

The compound that generate methyl ethyl ketone upon oxidation is -

  • 2-Propanol                               

  • 1-Butanol

  • 2-Butanol                                 

  • tert-Butyl alcohol

Rectified spirit contains:

  • 75.0 % alcohol                           

  • 85.5% alcohol

  • 95.6 % alcohol                           

  • 100.0% alcohol

The reaction of  with RMgX leads to the formation of                       

  • RCHOHR                               

  • RCHOHCH3

  • RCH2CH2OH                         

  •  >RRCHCH2OH

Increasing order of acidic strength of

p-Methoxy phenol (I),

p-Methyl phenol (II)

 p-Nitrophenol (III)

is -                                                             

  • III, I, II             

  • II, I, III           

  • III, II, I         

  • I, II, III   

Ethers are not distilled to dryness for fear of explosion. This is due to formation of:

  • oxides                             

  • alcohol

  • ketones                           

  • peroxides

In the following reaction,                                               

→H+/Heat A           +              B

                                                                       (Major product)      (Minor product)

II.  A→in absence of peroxideHBr, dark C             +            D

                             (Major product)         (Minor product)

The major products A and C are respectively

(I )

(II) 

(III) 

(IV) 

 
  • 1
  • 2

  • CH3 (d) CH2-C-CH2-CH3 and CH CH2-CH-CH2-CH Br

  • 4

Isopropyl alcohol and n-propyl alcohol are:

  • Position isomers                               

  • Chain isomers

  • Functional isomers                             

  • None of the above

The best reagent to convert pent-3-en-2-ol into pent-3-en-2-one is:

  • Acidic KMnO4

  • Alkaline K2Cr2O7

  • Chromium anhydride in glacial acetic acid

  • Pyridinium Chlorochromate

Absolute alcohol contains:

  • 40% H2O                         

  • 10% H2O

  • 5% H2O                           

  • 100% C2H5OH

Dialkyl sulphides are known as:

  • sulphonal                         

  • mercaptan

  • thioethers                       

  • thioesters

The major product of the following reaction is-

  • a hemiacetal                 

  • an acetal

  • an ether                       

  • an ester

What is formed when a primary alcohol undergoes catalytic dehydrogenation?               

  • Aldehyde           

  • Ketone         

  • Alkene           

  • Acid

Diethyl ether absorbs oxygen to form:

 

  • red colored sweet smelling compound

  • acetic acid

  • ether suboxide

  • ether peroxide

Fenton's reagent is:

  • H2O + FeSO4                     

  • H2O2 + FeSO4

  • H2O2 + ZnSO4                   

  • NaOH + FeSO4

Propan-1-ol may be prepared by reaction of propene with -              

  • CH3COOH                                         

  • H3BO3

  • B2H6/NaOH-H2O2                               

  • H2SO4/H2O     

        

The product A in the above mentioned reaction is -

 

  •  

  •  

  •  

  •  

The correct order of decreasing acidic strength of the above compounds is -

  • III>I>II>IV                         

  • IV>III>I>II

  • II>IV>I>III                         

  • I>II>III>IV

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