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CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322910 ${CH}_{3} - {CH}_{2} - {CH}_{2} - Br + NaOH $ $ \overset{C_{2} H_{5} OH}{\to}$ Product A
supporting img
Consider the above reactions, identify product B and product C .

1

B = C = 1

- Propanol

2

B = 2

-Propanol,

C = 1

-Propanol

3

B =

1-Propanol,

C = 2

-Propanol

4

B = C = 2

-Propanol

Explanation:

Formation of ' $A$ ' is elimination.
$A \to B$ is addition of water according to Markovnikov's rule.
$A \to C$ is HBO (antimarkovnikov's addition of water).
supporting img
So, correct option is (2).

JEE Main - 2024

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322911 In the following reaction, A is
supporting img

1

C_{2} H_{5} C H_{2} C H O

2

C_{2} H_{5} C H_{2} C H_{2} O H

3

C_{2} H_{5} C H_{2} O H

4

C_{2} H_{5} C O H

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322912 To prepare 3-ethylpentan-3-ol, the reagents needed are

1

{CH}_{3} {CH}_{2} MgBr + {CH}_{3} {COCH}_{2} {CH}_{3}

2

{CH}_{3} MgBr + {CH}_{3} {CH}_{2} {CH}_{2} {COCH}_{2} {CH}_{3}

3

{CH}_{3} {CH}_{2} MgBr + {CH}_{3} {CH}_{2} {COCH}_{2} {CH}_{3}

4

{CH}_{3} {CH}_{2} {CH}_{2} MgBr + {CH}_{3} {COCH}_{2} {CH}_{3}

Explanation:

$C H_{3} C H_{2} MgBr + C H_{3} C H_{2} COC H_{2} C H_{3} \to$
supporting img

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322913 Which of the following statement(s) is/are correct about hydroboration-oxidation?

1 Diborane reacts with alkenes to give trialkyl boranes as addition product which is oxidised to alcohol by

H_{2} O_{2}

in the presence of aqueous

NaOH

.

2 The alcohol so formed by the addition of water to the alkene by the Markownikoff's rule.

3 Alcohol is obtained in the poor yield.

4 All of the above.

Explanation:

Diborane ${({BH}_{3})}_{2}$ reacts with alkenes to give trialkyl boranes as addition product. This is oxidised to alcohol by hydrogen peroxide in the presence of aqueous sodium hydroxide.
supporting img

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322914 The only alcohol that cannot be prepared by the indirect hydration of alkene is

1 ethyl alcohol

2 propyl alcohol

3 iso-butyl alcohol

4 methyl alcohol

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322910 ${CH}_{3} - {CH}_{2} - {CH}_{2} - Br + NaOH $ $ \overset{C_{2} H_{5} OH}{\to}$ Product A
supporting img
Consider the above reactions, identify product B and product C .

1

B = C = 1

- Propanol

2

B = 2

-Propanol,

C = 1

-Propanol

3

B =

1-Propanol,

C = 2

-Propanol

4

B = C = 2

-Propanol

Explanation:

Formation of ' $A$ ' is elimination.
$A \to B$ is addition of water according to Markovnikov's rule.
$A \to C$ is HBO (antimarkovnikov's addition of water).
supporting img
So, correct option is (2).

JEE Main - 2024

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322911 In the following reaction, A is
supporting img

1

C_{2} H_{5} C H_{2} C H O

2

C_{2} H_{5} C H_{2} C H_{2} O H

3

C_{2} H_{5} C H_{2} O H

4

C_{2} H_{5} C O H

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322912 To prepare 3-ethylpentan-3-ol, the reagents needed are

1

{CH}_{3} {CH}_{2} MgBr + {CH}_{3} {COCH}_{2} {CH}_{3}

2

{CH}_{3} MgBr + {CH}_{3} {CH}_{2} {CH}_{2} {COCH}_{2} {CH}_{3}

3

{CH}_{3} {CH}_{2} MgBr + {CH}_{3} {CH}_{2} {COCH}_{2} {CH}_{3}

4

{CH}_{3} {CH}_{2} {CH}_{2} MgBr + {CH}_{3} {COCH}_{2} {CH}_{3}

Explanation:

$C H_{3} C H_{2} MgBr + C H_{3} C H_{2} COC H_{2} C H_{3} \to$
supporting img

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322913 Which of the following statement(s) is/are correct about hydroboration-oxidation?

1 Diborane reacts with alkenes to give trialkyl boranes as addition product which is oxidised to alcohol by

H_{2} O_{2}

in the presence of aqueous

NaOH

.

2 The alcohol so formed by the addition of water to the alkene by the Markownikoff's rule.

3 Alcohol is obtained in the poor yield.

4 All of the above.

Explanation:

Diborane ${({BH}_{3})}_{2}$ reacts with alkenes to give trialkyl boranes as addition product. This is oxidised to alcohol by hydrogen peroxide in the presence of aqueous sodium hydroxide.
supporting img

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322914 The only alcohol that cannot be prepared by the indirect hydration of alkene is

1 ethyl alcohol

2 propyl alcohol

3 iso-butyl alcohol

4 methyl alcohol

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322910 ${CH}_{3} - {CH}_{2} - {CH}_{2} - Br + NaOH $ $ \overset{C_{2} H_{5} OH}{\to}$ Product A
supporting img
Consider the above reactions, identify product B and product C .

1

B = C = 1

- Propanol

2

B = 2

-Propanol,

C = 1

-Propanol

3

B =

1-Propanol,

C = 2

-Propanol

4

B = C = 2

-Propanol

Explanation:

Formation of ' $A$ ' is elimination.
$A \to B$ is addition of water according to Markovnikov's rule.
$A \to C$ is HBO (antimarkovnikov's addition of water).
supporting img
So, correct option is (2).

JEE Main - 2024

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322911 In the following reaction, A is
supporting img

1

C_{2} H_{5} C H_{2} C H O

2

C_{2} H_{5} C H_{2} C H_{2} O H

3

C_{2} H_{5} C H_{2} O H

4

C_{2} H_{5} C O H

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322912 To prepare 3-ethylpentan-3-ol, the reagents needed are

1

{CH}_{3} {CH}_{2} MgBr + {CH}_{3} {COCH}_{2} {CH}_{3}

2

{CH}_{3} MgBr + {CH}_{3} {CH}_{2} {CH}_{2} {COCH}_{2} {CH}_{3}

3

{CH}_{3} {CH}_{2} MgBr + {CH}_{3} {CH}_{2} {COCH}_{2} {CH}_{3}

4

{CH}_{3} {CH}_{2} {CH}_{2} MgBr + {CH}_{3} {COCH}_{2} {CH}_{3}

Explanation:

$C H_{3} C H_{2} MgBr + C H_{3} C H_{2} COC H_{2} C H_{3} \to$
supporting img

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322913 Which of the following statement(s) is/are correct about hydroboration-oxidation?

1 Diborane reacts with alkenes to give trialkyl boranes as addition product which is oxidised to alcohol by

H_{2} O_{2}

in the presence of aqueous

NaOH

.

2 The alcohol so formed by the addition of water to the alkene by the Markownikoff's rule.

3 Alcohol is obtained in the poor yield.

4 All of the above.

Explanation:

Diborane ${({BH}_{3})}_{2}$ reacts with alkenes to give trialkyl boranes as addition product. This is oxidised to alcohol by hydrogen peroxide in the presence of aqueous sodium hydroxide.
supporting img

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322914 The only alcohol that cannot be prepared by the indirect hydration of alkene is

1 ethyl alcohol

2 propyl alcohol

3 iso-butyl alcohol

4 methyl alcohol

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322910 ${CH}_{3} - {CH}_{2} - {CH}_{2} - Br + NaOH $ $ \overset{C_{2} H_{5} OH}{\to}$ Product A
supporting img
Consider the above reactions, identify product B and product C .

1

B = C = 1

- Propanol

2

B = 2

-Propanol,

C = 1

-Propanol

3

B =

1-Propanol,

C = 2

-Propanol

4

B = C = 2

-Propanol

Explanation:

Formation of ' $A$ ' is elimination.
$A \to B$ is addition of water according to Markovnikov's rule.
$A \to C$ is HBO (antimarkovnikov's addition of water).
supporting img
So, correct option is (2).

JEE Main - 2024

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322911 In the following reaction, A is
supporting img

1

C_{2} H_{5} C H_{2} C H O

2

C_{2} H_{5} C H_{2} C H_{2} O H

3

C_{2} H_{5} C H_{2} O H

4

C_{2} H_{5} C O H

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322912 To prepare 3-ethylpentan-3-ol, the reagents needed are

1

{CH}_{3} {CH}_{2} MgBr + {CH}_{3} {COCH}_{2} {CH}_{3}

2

{CH}_{3} MgBr + {CH}_{3} {CH}_{2} {CH}_{2} {COCH}_{2} {CH}_{3}

3

{CH}_{3} {CH}_{2} MgBr + {CH}_{3} {CH}_{2} {COCH}_{2} {CH}_{3}

4

{CH}_{3} {CH}_{2} {CH}_{2} MgBr + {CH}_{3} {COCH}_{2} {CH}_{3}

Explanation:

$C H_{3} C H_{2} MgBr + C H_{3} C H_{2} COC H_{2} C H_{3} \to$
supporting img

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322913 Which of the following statement(s) is/are correct about hydroboration-oxidation?

1 Diborane reacts with alkenes to give trialkyl boranes as addition product which is oxidised to alcohol by

H_{2} O_{2}

in the presence of aqueous

NaOH

.

2 The alcohol so formed by the addition of water to the alkene by the Markownikoff's rule.

3 Alcohol is obtained in the poor yield.

4 All of the above.

Explanation:

Diborane ${({BH}_{3})}_{2}$ reacts with alkenes to give trialkyl boranes as addition product. This is oxidised to alcohol by hydrogen peroxide in the presence of aqueous sodium hydroxide.
supporting img

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322914 The only alcohol that cannot be prepared by the indirect hydration of alkene is

1 ethyl alcohol

2 propyl alcohol

3 iso-butyl alcohol

4 methyl alcohol

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322910 ${CH}_{3} - {CH}_{2} - {CH}_{2} - Br + NaOH $ $ \overset{C_{2} H_{5} OH}{\to}$ Product A
supporting img
Consider the above reactions, identify product B and product C .

1

B = C = 1

- Propanol

2

B = 2

-Propanol,

C = 1

-Propanol

3

B =

1-Propanol,

C = 2

-Propanol

4

B = C = 2

-Propanol

Explanation:

Formation of ' $A$ ' is elimination.
$A \to B$ is addition of water according to Markovnikov's rule.
$A \to C$ is HBO (antimarkovnikov's addition of water).
supporting img
So, correct option is (2).

JEE Main - 2024

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322911 In the following reaction, A is
supporting img

1

C_{2} H_{5} C H_{2} C H O

2

C_{2} H_{5} C H_{2} C H_{2} O H

3

C_{2} H_{5} C H_{2} O H

4

C_{2} H_{5} C O H

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322912 To prepare 3-ethylpentan-3-ol, the reagents needed are

1

{CH}_{3} {CH}_{2} MgBr + {CH}_{3} {COCH}_{2} {CH}_{3}

2

{CH}_{3} MgBr + {CH}_{3} {CH}_{2} {CH}_{2} {COCH}_{2} {CH}_{3}

3

{CH}_{3} {CH}_{2} MgBr + {CH}_{3} {CH}_{2} {COCH}_{2} {CH}_{3}

4

{CH}_{3} {CH}_{2} {CH}_{2} MgBr + {CH}_{3} {COCH}_{2} {CH}_{3}

Explanation:

$C H_{3} C H_{2} MgBr + C H_{3} C H_{2} COC H_{2} C H_{3} \to$
supporting img

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322913 Which of the following statement(s) is/are correct about hydroboration-oxidation?

1 Diborane reacts with alkenes to give trialkyl boranes as addition product which is oxidised to alcohol by

H_{2} O_{2}

in the presence of aqueous

NaOH

.

2 The alcohol so formed by the addition of water to the alkene by the Markownikoff's rule.

3 Alcohol is obtained in the poor yield.

4 All of the above.

Explanation:

Diborane ${({BH}_{3})}_{2}$ reacts with alkenes to give trialkyl boranes as addition product. This is oxidised to alcohol by hydrogen peroxide in the presence of aqueous sodium hydroxide.
supporting img

CHXII11:ALCOHOLS, PHENOLS AND ETHERS

322914 The only alcohol that cannot be prepared by the indirect hydration of alkene is

1 ethyl alcohol

2 propyl alcohol

3 iso-butyl alcohol

4 methyl alcohol