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CHXII10:HALOALKANES AND HALOARENES

322745 The compound with no dipole moment is

1 Methyl chloride

2 Carbon tetrachloride

3 Methylene chloride

4 Chloroform

Explanation:

Carbon tetrachloride has tetrahedral structure and its four polar $C - Cl$ bonds cancel each other dipole moment which results in net dipole moment zero.

CHXII10:HALOALKANES AND HALOARENES

322746 The correct decreasing order of dipole moment $C H_{3} C l$ , $C H_{3} B r_{3}$ and $C H_{3} F$ is

1

C H_{3} F > C H_{3} C l > C H_{3} B r_{3}

2

C H_{3} F > C H_{3} B r > C H_{3} C l

3

C H_{3} C l > C H_{3} F > C H_{3} B r

4

C H_{3} C l > C H_{3} B r > C H_{3} F

Explanation:

$C H_{3} F$ is expected to have higest dipole moment But bon length is smaller than bond length. Hence $C H_{3} F$ dipole moment is less than $C H_{3} C l$ . Hence the correct decreasing order of dipole moment in $C H_{3} C l, C H_{3} B r_{3}, C H_{3} F i s$
$C H_{3} C l > C H_{3} F > C H_{3} B r_{3} .$

CHXII10:HALOALKANES AND HALOARENES

322747 Which one of the following compounds has the highest dipole moment?

1

{CH}_{3} {NO}_{2}

2

{CH}_{3} Cl

3

{CCl}_{4}

4

{CH}_{2} {Cl}_{2}

CHXII10:HALOALKANES AND HALOARENES

322748 Arrange the following in the decreasing order of dipole moment.
supporting img

1 I

>

II

>

III

2 II

>

I

>

III

3 III

>

II

>

I

4 I

>

III

>

II

Explanation:

I $>$ II $>$ III
supporting img

There is intramolecular hydrogen bonding which decreases the bond angle $(< 60^{\circ})$ hence the dipole is decreased.

Dipole-dipole repulsion of two chlorine atoms in ortho-position increases the bond angle $(> 60^{\circ})$ hence the dipole is decreased.

CHXII10:HALOALKANES AND HALOARENES

322745 The compound with no dipole moment is

1 Methyl chloride

2 Carbon tetrachloride

3 Methylene chloride

4 Chloroform

Explanation:

Carbon tetrachloride has tetrahedral structure and its four polar $C - Cl$ bonds cancel each other dipole moment which results in net dipole moment zero.

CHXII10:HALOALKANES AND HALOARENES

322746 The correct decreasing order of dipole moment $C H_{3} C l$ , $C H_{3} B r_{3}$ and $C H_{3} F$ is

1

C H_{3} F > C H_{3} C l > C H_{3} B r_{3}

2

C H_{3} F > C H_{3} B r > C H_{3} C l

3

C H_{3} C l > C H_{3} F > C H_{3} B r

4

C H_{3} C l > C H_{3} B r > C H_{3} F

Explanation:

$C H_{3} F$ is expected to have higest dipole moment But bon length is smaller than bond length. Hence $C H_{3} F$ dipole moment is less than $C H_{3} C l$ . Hence the correct decreasing order of dipole moment in $C H_{3} C l, C H_{3} B r_{3}, C H_{3} F i s$
$C H_{3} C l > C H_{3} F > C H_{3} B r_{3} .$

CHXII10:HALOALKANES AND HALOARENES

322747 Which one of the following compounds has the highest dipole moment?

1

{CH}_{3} {NO}_{2}

2

{CH}_{3} Cl

3

{CCl}_{4}

4

{CH}_{2} {Cl}_{2}

CHXII10:HALOALKANES AND HALOARENES

322748 Arrange the following in the decreasing order of dipole moment.
supporting img

1 I

>

II

>

III

2 II

>

I

>

III

3 III

>

II

>

I

4 I

>

III

>

II

Explanation:

I $>$ II $>$ III
supporting img

There is intramolecular hydrogen bonding which decreases the bond angle $(< 60^{\circ})$ hence the dipole is decreased.

Dipole-dipole repulsion of two chlorine atoms in ortho-position increases the bond angle $(> 60^{\circ})$ hence the dipole is decreased.

CHXII10:HALOALKANES AND HALOARENES

322745 The compound with no dipole moment is

1 Methyl chloride

2 Carbon tetrachloride

3 Methylene chloride

4 Chloroform

Explanation:

Carbon tetrachloride has tetrahedral structure and its four polar $C - Cl$ bonds cancel each other dipole moment which results in net dipole moment zero.

CHXII10:HALOALKANES AND HALOARENES

322746 The correct decreasing order of dipole moment $C H_{3} C l$ , $C H_{3} B r_{3}$ and $C H_{3} F$ is

1

C H_{3} F > C H_{3} C l > C H_{3} B r_{3}

2

C H_{3} F > C H_{3} B r > C H_{3} C l

3

C H_{3} C l > C H_{3} F > C H_{3} B r

4

C H_{3} C l > C H_{3} B r > C H_{3} F

Explanation:

$C H_{3} F$ is expected to have higest dipole moment But bon length is smaller than bond length. Hence $C H_{3} F$ dipole moment is less than $C H_{3} C l$ . Hence the correct decreasing order of dipole moment in $C H_{3} C l, C H_{3} B r_{3}, C H_{3} F i s$
$C H_{3} C l > C H_{3} F > C H_{3} B r_{3} .$

CHXII10:HALOALKANES AND HALOARENES

322747 Which one of the following compounds has the highest dipole moment?

1

{CH}_{3} {NO}_{2}

2

{CH}_{3} Cl

3

{CCl}_{4}

4

{CH}_{2} {Cl}_{2}

CHXII10:HALOALKANES AND HALOARENES

322748 Arrange the following in the decreasing order of dipole moment.
supporting img

1 I

>

II

>

III

2 II

>

I

>

III

3 III

>

II

>

I

4 I

>

III

>

II

Explanation:

I $>$ II $>$ III
supporting img

There is intramolecular hydrogen bonding which decreases the bond angle $(< 60^{\circ})$ hence the dipole is decreased.

Dipole-dipole repulsion of two chlorine atoms in ortho-position increases the bond angle $(> 60^{\circ})$ hence the dipole is decreased.

CHXII10:HALOALKANES AND HALOARENES

322745 The compound with no dipole moment is

1 Methyl chloride

2 Carbon tetrachloride

3 Methylene chloride

4 Chloroform

Explanation:

Carbon tetrachloride has tetrahedral structure and its four polar $C - Cl$ bonds cancel each other dipole moment which results in net dipole moment zero.

CHXII10:HALOALKANES AND HALOARENES

322746 The correct decreasing order of dipole moment $C H_{3} C l$ , $C H_{3} B r_{3}$ and $C H_{3} F$ is

1

C H_{3} F > C H_{3} C l > C H_{3} B r_{3}

2

C H_{3} F > C H_{3} B r > C H_{3} C l

3

C H_{3} C l > C H_{3} F > C H_{3} B r

4

C H_{3} C l > C H_{3} B r > C H_{3} F

Explanation:

$C H_{3} F$ is expected to have higest dipole moment But bon length is smaller than bond length. Hence $C H_{3} F$ dipole moment is less than $C H_{3} C l$ . Hence the correct decreasing order of dipole moment in $C H_{3} C l, C H_{3} B r_{3}, C H_{3} F i s$
$C H_{3} C l > C H_{3} F > C H_{3} B r_{3} .$

CHXII10:HALOALKANES AND HALOARENES

322747 Which one of the following compounds has the highest dipole moment?

1

{CH}_{3} {NO}_{2}

2

{CH}_{3} Cl

3

{CCl}_{4}

4

{CH}_{2} {Cl}_{2}

CHXII10:HALOALKANES AND HALOARENES

322748 Arrange the following in the decreasing order of dipole moment.
supporting img

1 I

>

II

>

III

2 II

>

I

>

III

3 III

>

II

>

I

4 I

>

III

>

II

Explanation:

I $>$ II $>$ III
supporting img

There is intramolecular hydrogen bonding which decreases the bond angle $(< 60^{\circ})$ hence the dipole is decreased.

Dipole-dipole repulsion of two chlorine atoms in ortho-position increases the bond angle $(> 60^{\circ})$ hence the dipole is decreased.