Alcohols, Phenols and Ethers  MCQs

MCQs of Alcohols, Phenols and Ethers

Showing 111 to 110 out of 120 Questions
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111.
Sodium phenoxide on reaction with methyl iodide produces compound X, which on Friedel-Craft's acylation produces compounds Y and Z. Mention compounds X,Y and Z.
(a) X = Methyl Benzene, Y = o-methoxy toluene

Z = p-methoxy toluene

(b) X = Methyl Benzene, Y = o-chloro anisole

Z = p-chloro anisole

(c) X = Anisole, Y = 1 (2-methoxy phenyl) ethan-1-one

Z = 1 (4-methoxy phenyl) ethan-1-one

(d) X = Anisole, Y = o-nitro anisole

Z = p-nitro anisole

Answer:

Option (c)

112.
What is the change in hybridization of carbon atom during dehydration of alcohol containing -OH ?
(a) sp3 to sp2
(b) sp2 to sp3
(c) sp3 to sp
(d) sp to sp2
Answer:

Option (a)

113.
Which of the following ether is symmetrical ?
(a) Phenoxy benzene
(b) Ethoxy propane
(c) Methoxy ethane
(d) Ethoxy benzene
Answer:

Option (a)

114.
Which of the following is the oxidizing agent ?
(a) Na2Cr2O7 / H2SO4
(b) LiAlH4 / H2O
(c) NaBH4 / H2O
(d) HI / Red P
Answer:

Option (a)

115.
Which of the following is correct for Lucas test ?
(a) Alcohol is heated with dilute HCl and anhydrous ZnCl2.
(b) If an oily drop appears in short time it must be 2º alcohol.
(c) Reaction with tertiary alcohol is difficult.
(d) Mixture become milky in about 5 minutes then, 2º alcohol.
Answer:

Option (d)

116.
Phenol is more acidic than alcohol, because _____ .
(a) in alkoxide, the negative charge is localized on an oxygen atom becomes delocalised
(b) in phenoxide ion, the negative charge on an oxygen atom becomes delocalised
(c) stability of phenoxide ion is higher than that of alkoxide ion
(d) All of the above
Answer:

Option (d)

117.
Putting T for true statement and F for false statement, select correct choice ?

(i) Phenol is more acidic than alcohol.

(ii) o-nitro phenol has less melting point than that of p-nitro phenol.

(iii) Phenol is neutralized by sodium bicarbonate.

(iv) In aromatic ring of phenol, neucleophilic substitution reaction takes place.

(a) TTFF
(b) FTTF
(c) TTFT
(d) TFTF
Answer:

Option (a)

118.
What are 'A' and 'B' in the following reaction respectively ?

Ethanol →413 KH2SO4 A →∆2HBr B

(a) Ethene and ethyl bromide
(b) Diethyl ether and ethyl bromide
(c) Acetic acid and acetyl bromide
(d) Acetaldehyde and acetyl bromide
Answer:

Option (b)

119.
Which one of the following reactions gives different products ?
(a) Hydrolysis of diethyl ether in presence of dilute H2SO4
(b) Reaction of acetaldehyde with NaBH4
(c) Reaction of ethyl acetate with LiAlH4
(d) Reaction of formaldehyde with ethyl magnesium bromide
Answer:

Option (d)

120.
Which of the following order is incorrect ?
(a) Acidic strength of alcohol : 3º > 2º > 1º
(b) Solubility of alcohol : diol < triol < tetrol
(c) Boiling points of alcohol : 1º > 2º > 3º
(d) Rate of reaction of Lucas test : 3º > 2º > 1º
Answer:

Option (a)

Showing 111 to 110 out of 120 Questions
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