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:

(a) benzene, nitrobenzene and aniline

(b) benzene, dinitrobenzene and m-nitroaniline

(c) toluene, m-nitrobenzene and m-toluidine

(d) benzene, nitrobenzene and hydrazobenzene

Concept Questions :-

Phenols: Preparation, Properties, Acidic Nature of Phenol
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Phenol on oxidation gives chloranil. The oxidant used is:

1. K2S2O8

2. KMnO4

3. KCIO3 + HCl

4. none of these

Concept Questions :-

Phenols: Preparation, Properties, Acidic Nature of Phenol
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A characteristic group test for phenolic gp. is:

1. Liebermann's nitroso reaction
2. coupling with diazonium salt
3. aqueous FeCl3
4. all of the above

Concept Questions :-

Phenols: Preparation, Properties, Acidic Nature of Phenol
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Phenol can be converted into salicylic acid by
(a) Etard's reaction
(b) Kolbe's reaction
(c) Reimer-Tiemann reaction
(d) both (b) and (c)

Concept Questions :-

Phenols: Preparation, Properties, Acidic Nature of Phenol
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Resorcinol and conc. H2SO4 in presence of phthalic anhydride produce a compound which is:

1. a dye                             

2. an antiseptic

3. an indicator                   

4. a detergent

Concept Questions :-

Phenols: Preparation, Properties, Acidic Nature of Phenol
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Phenol is weakly acidic but does not react with NaHCO3 like carboxylic acids hence:-

1. phenol is weaker than carbonic acid
2. phenol is stronger than carbonic acid
3. phenol is stronger than carboxylic acid
4. none of the above

Concept Questions :-

Phenols: Preparation, Properties, Acidic Nature of Phenol
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An organic compound C7H8O is neither soluble in NaOH nor gives blue colour with FeCl3, is:

(a) C6H5.CH2OH                 (b) C6H4<OHCH3

(c) C6H5.OCH3                   (d) none of these

Concept Questions :-

Ethers: Preparation, Physical & Chemical Properties, Uses
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The electrophile involved in the above reaction is:
1. dichloromethyl cation (CHCl2)
2. dichlorocarbene (:CCl2)
3. trichloromethyl anion (CCl3)
4. formyl cation (CHO)

Concept Questions :-

Phenols: Preparation, Properties, Acidic Nature of Phenol
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Which of the following reagents may be used to distinguish between phenol and benzoic acid?

(a) Aqueous NaOH

(b) Tollens reagent

(c) Molisch reagent

(d) Neutral FeCl3

Concept Questions :-

Phenols: Preparation, Properties, Acidic Nature of Phenol
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In the given transformation, which of the following is the most appropriate reagent ?

(a) Zn-Hg/HCl

(b) Na, Liq. NH3

(c) NaBH4

(d) NH2NH2,OH

 

Concept Questions :-

Alcohols: Preparation, Physical and Chemical Properties
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