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JEE Questions for Chemistry Alcohols Phenols And Ethers Quiz 5 - MCQExams.com
JEE
Chemistry
Alcohols Phenols And Ethers
Quiz 5
Identify the correct product formed during the following reaction
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What represents the best method producing salicylic acid?
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Benzoic acid, strong base, high temperature
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Toluene, strong base, water, high temperature
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Phenol, base, carbon dioxide then acid
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Bromobenzene, carbonic acid, high temperature
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When phenol is treated with D
2
SO
4
/ D
2
O, some of the hydrogens get exchanged. The final product in this exchange reaction is
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In the following reaction, the product(s) formed is (are)
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P (major)
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Q (minor)
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R (minor)
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S (major)
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Both (and (4)
Reimer-Tiemann reaction involves
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carbonium ion intermediate
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carbene intermediate
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carbanion intermediate
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free radical intermediate
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Phenol, acetone
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Phenol, acetaldehyde
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Benzoic acid, acetone
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Benzaldehyde, ethanol
The reaction of phenol with excess of bromine water gives
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m-bromophenol
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o-and p-bromophenol
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2, 4-dibromophenol
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2, 4, 6-tribromophenol
Phenol is heated with a solution of mixture of KBr and KBrO
3
.The major product obtained in the above reaction is
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2-bromophenol
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3-bromophenol
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4-bromophenol
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2, 4, 6-tribromophenol
Which of the following reagents may be used to distinguish between phenol and benzoic acid?
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Aqueous NaOH
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Tollen's reagent
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Molisch reagent
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Neutral FeCl3
The correct order of acid strength of the following compounds isI. Phenol II.
p
-cresol III.
m
-nitrophenol IV.
p
-nitrophenol
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III > II > I > IV
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IV > III > I > II
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II > IV > I > III
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I > II > IV > III
The conversion of
m
-nitrophenol to resorcinol involves respectively
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hydrolysis, diazotisation and reduction
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diazotisation, reduction and hydrolysis
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hydrolysis, reduction and diazotisation
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reduction, diazotisation and hydrolysis
Phenol can be converted to
o
-hydroxy benzaldehyde by
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Kolbe's reaction
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Reimer-Tiemann reaction
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Wurtz reaction
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Cannizaro reaction
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Sandmeyer's reaction
The correct order of decreasing acidity of nitrophenols will be
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m-nitrophenol > p-nitrophenol > o-nitrophenol
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o-nitrophenol > m-nitrophenol > p-nitrophenol
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p-nitrophenol > m-nitrophenol > o-nitrophenol
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p-nitrophenol > o-nitrophenol > m-nitrophenol
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Fries rearrangement and Kolbe-Schmidt
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Cumene and Reimer-Tiemann
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Dow and Reimer-Tiemann
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Dow and Friedel-Craft
When phenol is treated with excess of bromine water, it gives
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m-bromophenol
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o-and p-bromophenol
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2, 4-dibromophenol
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2,4,6-tribromophenol
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o-bromophenol
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p-bromophenol
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m-bromophenol
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2, 4, 6-tribromophenol
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bromine in benzene
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bromine in water
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potassium bromide solution
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bromine in carbon tetrachloride at 0°C
The major product obtained on interaction of phenol with sodium hydroxide and carbon dioxide is
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benzoic acid
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salicylaldehyde
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salicylic acid
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phthalic acid
In the reaction for dinitration
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Salicyl aldehyde is obtained when phenol is heated with CHCl
3
and aqueous NaOH. This reaction is known by which name?
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Carbyl amine reaction
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Hofmann's reaction
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Reimer-Tiemann reaction
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Kolbe-Schmidt reaction
Correct acidic order of the following compounds is
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I > II > III
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III > I > II
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II > III > I
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I > III > II
When
o
- or
p
-phenol sulphonic acid is treated with bromine water, the product formed is
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2, 4-dibromophenol
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2, 4, 6-tribromophenol
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3-bromophenol boric acid
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None of these
Phenol on heating with CCl
4
and aqueous KOH gives salicylic acid. This reaction is
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Friedel-Craft reaction
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Diels-Alder reaction
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Reimer-Tiemann reaction
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Wittig reaction
Benzoylation of phenol in alkaline medium is known as
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Friedel-Crafts reaction
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Wurtz-Fittig reaction
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Schotten-Baumann reaction
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Sabatier Senderens reduction
The following reaction is known as
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Perkin reaction
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Gattermann reaction
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Kolbe reaction
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Gattermann-aldehyde reaction
Phenol is more acidic than alcohol because
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phenol is more soluble in polar solvents
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alcohol does not lose hydrogen atom
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phenoxide ion is stabilised by resonance
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phenoxide ion doesn't exhibit resonance
The structure of the compound that gives a tribromo derivative on treatment with bromine water is
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Phenol can be distinguished from ethanol by the following reagents except
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sodium
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NaOH/I2
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neutral FeCl3
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Br2 /H2O
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phthalic anhydride/conc. H2SO4 and NaOH
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