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CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317218 Carbon-oxygen bond length of ${CH}_{2} O$ (I) ${CH}_{2} \overset{―}{O}$ (II), ${CH}_{3} OH$ (III) follows the order

1 I

>

II

>

III

2 II

>

I

>

III

3 III

>

II

>

I

4 III

>

I

>

II

Explanation:

Carbon-oxygen $(C - O)$ bond length of ${CH}_{2} O, {CH}_{2} O^{-}$ and ${CH}_{3} OH$ is in order. ${CH}_{3} OH > {CH}_{2} O^{-} > {CH}_{2} O$

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317219 Inductive effect of which atom is taken as zero to compare inductive effect of other atoms?

1 Hydrogen

2 Chlorine

3 Carbon

4 Oxygen

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317220 Identify the functional group that has electron donating inductive effect

1

- COOH

2

- CN

3

- {CH}_{3}

4

- {NO}_{2}

Explanation:

The functional group that has electron donating or positive inductive effect is $- {CH}_{3}$ . Since, the positive inductive effect is due to the presence of an electron donating groups within the polar bond. Thus, option (3) is correct as rest of the three groups $(- COOH, - CN$ , $- {NO}_{2})$ are electron withdrawing in nature.

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317221 Among the following, the one that has least $p K_{a}$ value is

1

{CCl}_{3} COOH

2

{CH}_{2} ClCOOH

3

{CF}_{3} COOH

4

{CH}_{3} COOH

Explanation:

${CF}_{3} COOH$ is the strongest acid due to greatest $- I$ effect of $- F$ atom among $- Cl$ and $- {CH}_{3}$ .

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317218 Carbon-oxygen bond length of ${CH}_{2} O$ (I) ${CH}_{2} \overset{―}{O}$ (II), ${CH}_{3} OH$ (III) follows the order

1 I

>

II

>

III

2 II

>

I

>

III

3 III

>

II

>

I

4 III

>

I

>

II

Explanation:

Carbon-oxygen $(C - O)$ bond length of ${CH}_{2} O, {CH}_{2} O^{-}$ and ${CH}_{3} OH$ is in order. ${CH}_{3} OH > {CH}_{2} O^{-} > {CH}_{2} O$

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317219 Inductive effect of which atom is taken as zero to compare inductive effect of other atoms?

1 Hydrogen

2 Chlorine

3 Carbon

4 Oxygen

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317220 Identify the functional group that has electron donating inductive effect

1

- COOH

2

- CN

3

- {CH}_{3}

4

- {NO}_{2}

Explanation:

The functional group that has electron donating or positive inductive effect is $- {CH}_{3}$ . Since, the positive inductive effect is due to the presence of an electron donating groups within the polar bond. Thus, option (3) is correct as rest of the three groups $(- COOH, - CN$ , $- {NO}_{2})$ are electron withdrawing in nature.

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317221 Among the following, the one that has least $p K_{a}$ value is

1

{CCl}_{3} COOH

2

{CH}_{2} ClCOOH

3

{CF}_{3} COOH

4

{CH}_{3} COOH

Explanation:

${CF}_{3} COOH$ is the strongest acid due to greatest $- I$ effect of $- F$ atom among $- Cl$ and $- {CH}_{3}$ .

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317218 Carbon-oxygen bond length of ${CH}_{2} O$ (I) ${CH}_{2} \overset{―}{O}$ (II), ${CH}_{3} OH$ (III) follows the order

1 I

>

II

>

III

2 II

>

I

>

III

3 III

>

II

>

I

4 III

>

I

>

II

Explanation:

Carbon-oxygen $(C - O)$ bond length of ${CH}_{2} O, {CH}_{2} O^{-}$ and ${CH}_{3} OH$ is in order. ${CH}_{3} OH > {CH}_{2} O^{-} > {CH}_{2} O$

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317219 Inductive effect of which atom is taken as zero to compare inductive effect of other atoms?

1 Hydrogen

2 Chlorine

3 Carbon

4 Oxygen

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317220 Identify the functional group that has electron donating inductive effect

1

- COOH

2

- CN

3

- {CH}_{3}

4

- {NO}_{2}

Explanation:

The functional group that has electron donating or positive inductive effect is $- {CH}_{3}$ . Since, the positive inductive effect is due to the presence of an electron donating groups within the polar bond. Thus, option (3) is correct as rest of the three groups $(- COOH, - CN$ , $- {NO}_{2})$ are electron withdrawing in nature.

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317221 Among the following, the one that has least $p K_{a}$ value is

1

{CCl}_{3} COOH

2

{CH}_{2} ClCOOH

3

{CF}_{3} COOH

4

{CH}_{3} COOH

Explanation:

${CF}_{3} COOH$ is the strongest acid due to greatest $- I$ effect of $- F$ atom among $- Cl$ and $- {CH}_{3}$ .

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317218 Carbon-oxygen bond length of ${CH}_{2} O$ (I) ${CH}_{2} \overset{―}{O}$ (II), ${CH}_{3} OH$ (III) follows the order

1 I

>

II

>

III

2 II

>

I

>

III

3 III

>

II

>

I

4 III

>

I

>

II

Explanation:

Carbon-oxygen $(C - O)$ bond length of ${CH}_{2} O, {CH}_{2} O^{-}$ and ${CH}_{3} OH$ is in order. ${CH}_{3} OH > {CH}_{2} O^{-} > {CH}_{2} O$

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317219 Inductive effect of which atom is taken as zero to compare inductive effect of other atoms?

1 Hydrogen

2 Chlorine

3 Carbon

4 Oxygen

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317220 Identify the functional group that has electron donating inductive effect

1

- COOH

2

- CN

3

- {CH}_{3}

4

- {NO}_{2}

Explanation:

The functional group that has electron donating or positive inductive effect is $- {CH}_{3}$ . Since, the positive inductive effect is due to the presence of an electron donating groups within the polar bond. Thus, option (3) is correct as rest of the three groups $(- COOH, - CN$ , $- {NO}_{2})$ are electron withdrawing in nature.

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317221 Among the following, the one that has least $p K_{a}$ value is

1

{CCl}_{3} COOH

2

{CH}_{2} ClCOOH

3

{CF}_{3} COOH

4

{CH}_{3} COOH

Explanation:

${CF}_{3} COOH$ is the strongest acid due to greatest $- I$ effect of $- F$ atom among $- Cl$ and $- {CH}_{3}$ .