Which represents Reimer-Tiemann reraction ?
(1)
(2)
(3)
(4)

  • 1
  • 2
  • 3
  • 4

When phenol is treated with excess bromine water, it gives:


  • m-bromophenol

  • o- and p-bromophenol

  • 2,4-dibromophenol

  • 2,4,6-tribromophenol

In the reaction, Phenol DIstillationZn(A) Conc. HNO3 at 60°CConc. H2SO4(B) NaOH(aq)Zn(C)

The compounds (A),(B) and (C) are of the following:

  • benzene, nitrobenzene and aniline

  • benzene, dinitrobenzene and m-nitroaniline

  • toluene, m-nitrobenzene and m-toluidine

  • benzene, nitrobenzene and hydrazobenzene

Phenol on oxidation gives chloranil. The oxidant used is:

  • K2S2O8

  • KMnO4

  • KCIO3 + HCl

  • none of these

A characteristic group test for phenolic gp. is:

  • Liebermann's nitroso reaction

  • coupling with diazonium salt

  • aqueous FeCl3

  • all of the above

Phenol can be converted into salicylic acid by

2. Kolbe's reaction

  • Etard's reaction

  • 4. both (2) and (3) 

  • Phenol with CCl4 in basic medium

  • 4

Resorcinol and conc. H2SO4 in presence of phthalic anhydride produce a compound which is:

  • a dye                             

  • an antiseptic

  • an indicator                   

  • a detergent

Phenol is weakly acidic but does not react with NaHCO3 like carboxylic acids hence:-

  • phenol is weaker than carbonic acid

  • phenol is stronger than carbonic acid

  • phenol is stronger than carboxylic acid

  • none of the above

An organic compound C7H8O is neither soluble in NaOH nor gives blue colour with FeCl3, is:

  • C6H5.CH2OH                 

  •  C6H4<OHCH3

  • C6H5.OCH3                   

  • none of these

The electrophile involved in the above reaction is:

  • dichloromethyl cation (CHCl2)
  • dichlorocarbene (:CCl2)
  • trichloromethyl anion (CCl3)
  • formyl cation (CHO)

Which of the following reagents may be used to distinguish between phenol and benzoic acid?

  • Aqueous NaOH

  • Tollens reagent

  • Molisch reagent

  • Neutral FeCl3

In the given transformation, which of the following is the most appropriate reagent ?

 

  • Zn-Hg/HCl

  • Na, Liq. NH3

  • NaBH4

  • NH2NH2,OH

An unknown alcohol is treated with the “Lucas reagent” to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts the fastest and by what mechanism:

  • secondary alcohol by SN2

  • tertiary alcohol by SN2

  • secondary alcohol by SN1

  • tertiary alcohol by SN1

Sodium phenoxide when heated with CO2 under pressure at 125°C yields a product which on acetylation produces C.

The major product C would be :

  •  

  •  

  •  

  •  

A compound with molecular formula C4H10O3 is converted by the action of acetyl chloride to a compound with molar mass 190. The original compound has: 

  • one OH group

  • two OH groups

  • three OH groups

  • no OH group

Phenyl ethyl ether with concentrated hydrobromic acid on boiling yields:-

  • Phenol and ethyl bromide

  • Bromobenzene and ethanol

  • Phenol and ethane

  • Bromobenzene and ethane

The compound that does not react with sodium is-

  • CH3CHOHCH3

  • CH3 —O—CH3

  • CH3COOH

  • C2H5OH

An organic compound A reacts with sodium metal and forms B. On heating with conc. H2SO4, A gives diethyl ether. So A and B are -                                                            

  • C3H7OH and CH3ONa
  • CH3OH and CH3ONa
  • C4H9OH and C4H9ONa
  • C2H5OH and C2H5ONa

Phenol on treatment with dil. HNO3 at room temperature gives-

1.

 2.

  • 1
  • 2
  • 3. 

  • 4. All of the above

Identify A and predict the type of reactions

2. and elimination addition reaction
3.   and cine substitution reaction

4.      and cine substitution reaction

  •    and substitution reaction

  • 2
  • 3
  • 4

Identify A, X, Y and Z 

  • A-methoxymethane, X-ethanoic acid, Y-acetate ion, Z-hydrazine

  • A- methoxymethane, X-ethanol, Y-ethanoic acid, Z- semicarbazide

  • A-Acetaldehyde, X-ethanol, Y-but-2-en-1-ol, Z- semicarbazone

  • A-ethanol, X-acetaldehyde, Y-butanone, Z-hydrazone

Which one is the most acidic compound ?

  • 1
  • 2
  • 3
  • 4

The reaction 

can be classified as

  • Alcohol formation reaction

  • Dehydration reaction

  • Williamson alcohol synthesis reaction

  • Williamson ether synthesis reaction

Reaction of phenol with chloroform in the presence of dilute sodium hydroxide finally

introduces, which one of the following functional group?

  • -CH2Cl                       

  • -COOH

  • -CHCl2                       

  • -CHO

Which of the following is not the product of dehydration of

 

  •  

  •  

  •  

  •  

Among the following ethers, the one that will produce methyl alcohol on treatment with hot concentrated HI is-


  •  

H2COH.CH2OH on heating with periodic acid gives :-
                                    

  • 2CO2       

  • 2HCOOH       

  • CHO-CHO     

  •          

Acetophenone when reacted with a base, C2H5ONa, yields a stable compound which has the structure


 

  • 1
  • 2
  • 3
  • 4

The reaction:

CH3-CH|CH3-CH2-O-CH2-CH3 + HI heated?

Which of the following compounds will be formed?

 

  •  CH3-C|CH3H-CH2-I+CH3CH2OH

  •  CH3-C|CH3H-CH3+CH3CH2OH

  •  CH3-C|CH3H-CH2OH+CH3CH3

  •  CH3-C|CH3H-CH2OH+CH3-CH2-I

The major organic product in the reaction, CH3 — O — CH(CH3)2 + HI  Product is :

  • CH3OH+(CH3)2CHI

  • ICH3OCH(CH3)2

  • CH3O CI(CH3)2

  • CH3I+(CH3)2CHOH

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