QBManager

ALCOHOLS, PHENOLS AND ETHER

15485 $H B r$ reacts with $C H_{2} = C H - O C H_{3}$ at room temperature to give

1

B r C H_{2} C H O

and

C H_{3} O H

2

B r C H_{2} - C H_{2} - O C H_{3}

3

H_{3} C - C H B r - O C H_{3}

4

C H_{3} C H O

and

C H_{3} B r

ALCOHOLS, PHENOLS AND ETHER

15486 Which one of the following will most readily dehydrated in acidic condition

1

2

3

4

ALCOHOLS, PHENOLS AND ETHER

15487 The number of stereoisomers possible for a compound of the molecular formula $C H_{3} - C H = C H - C H (O H) - M e$ is

1

4

2

6

3

3

4

2

ALCOHOLS, PHENOLS AND ETHER

15488 $X$ can be -

1 conc.

H_{2} S O_{4}

2

P O C l_{3}

/ Pyridine

3 conc.

H_{3} P O_{4}

4 None of these

Explanation:

In case of conc. $H_{2} S O_{4}$ & conc. $H_{3} P O_{4}, E_{1}$ mechanism will be followed ring expansion will occur but with $P O C l_{3}$ / Pyridine $E_{2}$ mechanism.

ALCOHOLS, PHENOLS AND ETHER

15489 (major) ' $A$ ' and ' $B$ ' are respectively

1

2

3

4

ALCOHOLS, PHENOLS AND ETHER

15485 $H B r$ reacts with $C H_{2} = C H - O C H_{3}$ at room temperature to give

1

B r C H_{2} C H O

and

C H_{3} O H

2

B r C H_{2} - C H_{2} - O C H_{3}

3

H_{3} C - C H B r - O C H_{3}

4

C H_{3} C H O

and

C H_{3} B r

ALCOHOLS, PHENOLS AND ETHER

15486 Which one of the following will most readily dehydrated in acidic condition

1

2

3

4

ALCOHOLS, PHENOLS AND ETHER

15487 The number of stereoisomers possible for a compound of the molecular formula $C H_{3} - C H = C H - C H (O H) - M e$ is

1

4

2

6

3

3

4

2

ALCOHOLS, PHENOLS AND ETHER

15488 $X$ can be -

1 conc.

H_{2} S O_{4}

2

P O C l_{3}

/ Pyridine

3 conc.

H_{3} P O_{4}

4 None of these

Explanation:

In case of conc. $H_{2} S O_{4}$ & conc. $H_{3} P O_{4}, E_{1}$ mechanism will be followed ring expansion will occur but with $P O C l_{3}$ / Pyridine $E_{2}$ mechanism.

ALCOHOLS, PHENOLS AND ETHER

15489 (major) ' $A$ ' and ' $B$ ' are respectively

1

2

3

4

ALCOHOLS, PHENOLS AND ETHER

15485 $H B r$ reacts with $C H_{2} = C H - O C H_{3}$ at room temperature to give

1

B r C H_{2} C H O

and

C H_{3} O H

2

B r C H_{2} - C H_{2} - O C H_{3}

3

H_{3} C - C H B r - O C H_{3}

4

C H_{3} C H O

and

C H_{3} B r

ALCOHOLS, PHENOLS AND ETHER

15486 Which one of the following will most readily dehydrated in acidic condition

1

2

3

4

ALCOHOLS, PHENOLS AND ETHER

15487 The number of stereoisomers possible for a compound of the molecular formula $C H_{3} - C H = C H - C H (O H) - M e$ is

1

4

2

6

3

3

4

2

ALCOHOLS, PHENOLS AND ETHER

15488 $X$ can be -

1 conc.

H_{2} S O_{4}

2

P O C l_{3}

/ Pyridine

3 conc.

H_{3} P O_{4}

4 None of these

Explanation:

In case of conc. $H_{2} S O_{4}$ & conc. $H_{3} P O_{4}, E_{1}$ mechanism will be followed ring expansion will occur but with $P O C l_{3}$ / Pyridine $E_{2}$ mechanism.

ALCOHOLS, PHENOLS AND ETHER

15489 (major) ' $A$ ' and ' $B$ ' are respectively

1

2

3

4

ALCOHOLS, PHENOLS AND ETHER

15485 $H B r$ reacts with $C H_{2} = C H - O C H_{3}$ at room temperature to give

1

B r C H_{2} C H O

and

C H_{3} O H

2

B r C H_{2} - C H_{2} - O C H_{3}

3

H_{3} C - C H B r - O C H_{3}

4

C H_{3} C H O

and

C H_{3} B r

ALCOHOLS, PHENOLS AND ETHER

15486 Which one of the following will most readily dehydrated in acidic condition

1

2

3

4

ALCOHOLS, PHENOLS AND ETHER

15487 The number of stereoisomers possible for a compound of the molecular formula $C H_{3} - C H = C H - C H (O H) - M e$ is

1

4

2

6

3

3

4

2

ALCOHOLS, PHENOLS AND ETHER

15488 $X$ can be -

1 conc.

H_{2} S O_{4}

2

P O C l_{3}

/ Pyridine

3 conc.

H_{3} P O_{4}

4 None of these

Explanation:

In case of conc. $H_{2} S O_{4}$ & conc. $H_{3} P O_{4}, E_{1}$ mechanism will be followed ring expansion will occur but with $P O C l_{3}$ / Pyridine $E_{2}$ mechanism.

ALCOHOLS, PHENOLS AND ETHER

15489 (major) ' $A$ ' and ' $B$ ' are respectively

1

2

3

4

ALCOHOLS, PHENOLS AND ETHER

15485 $H B r$ reacts with $C H_{2} = C H - O C H_{3}$ at room temperature to give

1

B r C H_{2} C H O

and

C H_{3} O H

2

B r C H_{2} - C H_{2} - O C H_{3}

3

H_{3} C - C H B r - O C H_{3}

4

C H_{3} C H O

and

C H_{3} B r

ALCOHOLS, PHENOLS AND ETHER

15486 Which one of the following will most readily dehydrated in acidic condition

1

2

3

4

ALCOHOLS, PHENOLS AND ETHER

15487 The number of stereoisomers possible for a compound of the molecular formula $C H_{3} - C H = C H - C H (O H) - M e$ is

1

4

2

6

3

3

4

2

ALCOHOLS, PHENOLS AND ETHER

15488 $X$ can be -

1 conc.

H_{2} S O_{4}

2

P O C l_{3}

/ Pyridine

3 conc.

H_{3} P O_{4}

4 None of these

Explanation:

In case of conc. $H_{2} S O_{4}$ & conc. $H_{3} P O_{4}, E_{1}$ mechanism will be followed ring expansion will occur but with $P O C l_{3}$ / Pyridine $E_{2}$ mechanism.

ALCOHOLS, PHENOLS AND ETHER

15489 (major) ' $A$ ' and ' $B$ ' are respectively

1

2

3

4

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Question Bank Series

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation: