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CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322952 Statement A :
supporting img
Statement B :
Alkoxides are not only nucleophiles but also the strong base, so they can react with alkyl halide to form the eliminated product.

1 Statement A is correct but Statement B is incorrect.

2 Statement A is incorrect but Statement B is correct.

3 Both statements are correct.

4 Both statements are incorrect.

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322953 The reaction,
$C_{2} H_{5} ONa + C_{2} H_{5} I \to C_{2} H_{5} {OC}_{2} H_{5} + NaI$
is known as

1 Grignard's synthesis

2 Kolbe's synthesis

3 Wurtz synthesis

4 Williamson's synthesis

Explanation:

Williamson's synthesis is a method for the preparation of sample and mixed ether. It involves the heating of alkyl haliders with sodium or potassium alkoxides.
$RONa + R'X \to ROR'+NaX$

KCET - 2006

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322954 Williamson's synthesis of preparing dimethyl ether is a/an:

1 Electrophilic substitution

2

S_{N} 1

reaction

3

S_{N} 2

reaction

4 Electrophilic addition

Explanation:

$R - X + {RO}^{-} {Na}^{+} \to R - O - R$
(Williamson's ether synthesis). It follows $S_{N} 2$ mechanism.

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322955 In Williamson's synthesis, ethoxyethane is prepared by

1 passing ethanol over heated alumina

2 heating sodium ethoxide with ethyl bromide

3 treating ethyl alcohol with excess of

H_{2} {SO}_{4}

at

430 - 440 K

4 heating ethanol with dry

{Ag}_{2} O

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322952 Statement A :
supporting img
Statement B :
Alkoxides are not only nucleophiles but also the strong base, so they can react with alkyl halide to form the eliminated product.

1 Statement A is correct but Statement B is incorrect.

2 Statement A is incorrect but Statement B is correct.

3 Both statements are correct.

4 Both statements are incorrect.

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322953 The reaction,
$C_{2} H_{5} ONa + C_{2} H_{5} I \to C_{2} H_{5} {OC}_{2} H_{5} + NaI$
is known as

1 Grignard's synthesis

2 Kolbe's synthesis

3 Wurtz synthesis

4 Williamson's synthesis

Explanation:

Williamson's synthesis is a method for the preparation of sample and mixed ether. It involves the heating of alkyl haliders with sodium or potassium alkoxides.
$RONa + R'X \to ROR'+NaX$

KCET - 2006

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322954 Williamson's synthesis of preparing dimethyl ether is a/an:

1 Electrophilic substitution

2

S_{N} 1

reaction

3

S_{N} 2

reaction

4 Electrophilic addition

Explanation:

$R - X + {RO}^{-} {Na}^{+} \to R - O - R$
(Williamson's ether synthesis). It follows $S_{N} 2$ mechanism.

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322955 In Williamson's synthesis, ethoxyethane is prepared by

1 passing ethanol over heated alumina

2 heating sodium ethoxide with ethyl bromide

3 treating ethyl alcohol with excess of

H_{2} {SO}_{4}

at

430 - 440 K

4 heating ethanol with dry

{Ag}_{2} O

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322952 Statement A :
supporting img
Statement B :
Alkoxides are not only nucleophiles but also the strong base, so they can react with alkyl halide to form the eliminated product.

1 Statement A is correct but Statement B is incorrect.

2 Statement A is incorrect but Statement B is correct.

3 Both statements are correct.

4 Both statements are incorrect.

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322953 The reaction,
$C_{2} H_{5} ONa + C_{2} H_{5} I \to C_{2} H_{5} {OC}_{2} H_{5} + NaI$
is known as

1 Grignard's synthesis

2 Kolbe's synthesis

3 Wurtz synthesis

4 Williamson's synthesis

Explanation:

Williamson's synthesis is a method for the preparation of sample and mixed ether. It involves the heating of alkyl haliders with sodium or potassium alkoxides.
$RONa + R'X \to ROR'+NaX$

KCET - 2006

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322954 Williamson's synthesis of preparing dimethyl ether is a/an:

1 Electrophilic substitution

2

S_{N} 1

reaction

3

S_{N} 2

reaction

4 Electrophilic addition

Explanation:

$R - X + {RO}^{-} {Na}^{+} \to R - O - R$
(Williamson's ether synthesis). It follows $S_{N} 2$ mechanism.

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322955 In Williamson's synthesis, ethoxyethane is prepared by

1 passing ethanol over heated alumina

2 heating sodium ethoxide with ethyl bromide

3 treating ethyl alcohol with excess of

H_{2} {SO}_{4}

at

430 - 440 K

4 heating ethanol with dry

{Ag}_{2} O

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322952 Statement A :
supporting img
Statement B :
Alkoxides are not only nucleophiles but also the strong base, so they can react with alkyl halide to form the eliminated product.

1 Statement A is correct but Statement B is incorrect.

2 Statement A is incorrect but Statement B is correct.

3 Both statements are correct.

4 Both statements are incorrect.

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322953 The reaction,
$C_{2} H_{5} ONa + C_{2} H_{5} I \to C_{2} H_{5} {OC}_{2} H_{5} + NaI$
is known as

1 Grignard's synthesis

2 Kolbe's synthesis

3 Wurtz synthesis

4 Williamson's synthesis

Explanation:

Williamson's synthesis is a method for the preparation of sample and mixed ether. It involves the heating of alkyl haliders with sodium or potassium alkoxides.
$RONa + R'X \to ROR'+NaX$

KCET - 2006

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322954 Williamson's synthesis of preparing dimethyl ether is a/an:

1 Electrophilic substitution

2

S_{N} 1

reaction

3

S_{N} 2

reaction

4 Electrophilic addition

Explanation:

$R - X + {RO}^{-} {Na}^{+} \to R - O - R$
(Williamson's ether synthesis). It follows $S_{N} 2$ mechanism.

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322955 In Williamson's synthesis, ethoxyethane is prepared by

1 passing ethanol over heated alumina

2 heating sodium ethoxide with ethyl bromide

3 treating ethyl alcohol with excess of

H_{2} {SO}_{4}

at

430 - 440 K

4 heating ethanol with dry

{Ag}_{2} O