QBManager

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317243 The correct order of increasing basicity of the given conjugate bases $(R = {CH}_{3})$ is

1

{RCOO}^{-} < H C \equiv C^{-} < R^{-} < N^{-} H_{2}

2

R^{-} < H C \equiv C^{-} < R C O O^{-} < N^{-} H_{2}

3

{RCOO}^{-} < N^{-} H_{2} < HC \equiv C^{-} < R^{-}

4

{RCOO}^{-} < HC \equiv C^{-} < N^{-} H_{2} < R^{-}

Explanation:

Increasing order of Basicity of conjugate base is $R C O O^{-} < C H \equiv C^{-} {< N H}_{2}^{-} < R^{-}$

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317244 Which among the following is incorrect statement?

1 Hydrogen ion

(H^{+})

shows negative electromeric effect.

2 Electromeric effect dominates over inductive effect.

3 The organic compound shows electromeric effect in the presence of the reagent only.

4 The electromeric effect is temporary effect.

Explanation:

$H^{+}$ shows positive electromeric effect. So, the correct option is (1).

JEE Main - 2024

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317258 Assertion :
Carbon-oxygen bonds are of equal length in carbonate ion.
Reason :
Bond length decreases with the multiplicity of bond between two atoms.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

${CO}_{3}^{2 -}$ shows resonance and thus all the three bonds are of identical bond length.
supporting img
As the no. of bonds between two atoms increase, bond length decrease. So both statements are true, but its not the correct reason. Thus, the option (2) is correct.

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317245 The increasing order of the boiling points for the following compounds is:
supporting img

1 (III)

<

(IV)

<

(II)

<

(I)

2 (IV)

<

(III)

<

(I)

<

(II)

3 (II)

<

(III)

<

(IV)

<

(I)

4 (III)

<

(II)

<

(I)

<

(IV)

Explanation:

(I) $C_{2} H_{5} OH$ : Hydrogen bonding >Dipole-Dipole
(II) Dipole-Dipole: $C_{2} H_{5} Cl$ is more polar than $C_{2} H_{5} {OCH}_{3}$ . So, Dipole-Dipole
$C_{2} H_{5} Cl >$ Dipole-Dipole $C_{2} H_{5} {OCH}_{3}$
(III) $C_{2} H_{5} {CH}_{3}$ : No hydrogen bonding and no dipole-dipole interaction
(IV) $C_{2} H_{5} {OCH}_{3}$ : Dipole-Dipole
Boiling point order is (III) $<$ (IV) $<$ (II) $<$ (I).

JEE - 2017

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317246 Assertion :
Inductive and electomeric effects require polar nature in the molecule.
Reason :
Polar nature in inductive effect is a must but not necessarily in electomeric effect.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317243 The correct order of increasing basicity of the given conjugate bases $(R = {CH}_{3})$ is

1

{RCOO}^{-} < H C \equiv C^{-} < R^{-} < N^{-} H_{2}

2

R^{-} < H C \equiv C^{-} < R C O O^{-} < N^{-} H_{2}

3

{RCOO}^{-} < N^{-} H_{2} < HC \equiv C^{-} < R^{-}

4

{RCOO}^{-} < HC \equiv C^{-} < N^{-} H_{2} < R^{-}

Explanation:

Increasing order of Basicity of conjugate base is $R C O O^{-} < C H \equiv C^{-} {< N H}_{2}^{-} < R^{-}$

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317244 Which among the following is incorrect statement?

1 Hydrogen ion

(H^{+})

shows negative electromeric effect.

2 Electromeric effect dominates over inductive effect.

3 The organic compound shows electromeric effect in the presence of the reagent only.

4 The electromeric effect is temporary effect.

Explanation:

$H^{+}$ shows positive electromeric effect. So, the correct option is (1).

JEE Main - 2024

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317258 Assertion :
Carbon-oxygen bonds are of equal length in carbonate ion.
Reason :
Bond length decreases with the multiplicity of bond between two atoms.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

${CO}_{3}^{2 -}$ shows resonance and thus all the three bonds are of identical bond length.
supporting img
As the no. of bonds between two atoms increase, bond length decrease. So both statements are true, but its not the correct reason. Thus, the option (2) is correct.

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317245 The increasing order of the boiling points for the following compounds is:
supporting img

1 (III)

<

(IV)

<

(II)

<

(I)

2 (IV)

<

(III)

<

(I)

<

(II)

3 (II)

<

(III)

<

(IV)

<

(I)

4 (III)

<

(II)

<

(I)

<

(IV)

Explanation:

(I) $C_{2} H_{5} OH$ : Hydrogen bonding >Dipole-Dipole
(II) Dipole-Dipole: $C_{2} H_{5} Cl$ is more polar than $C_{2} H_{5} {OCH}_{3}$ . So, Dipole-Dipole
$C_{2} H_{5} Cl >$ Dipole-Dipole $C_{2} H_{5} {OCH}_{3}$
(III) $C_{2} H_{5} {CH}_{3}$ : No hydrogen bonding and no dipole-dipole interaction
(IV) $C_{2} H_{5} {OCH}_{3}$ : Dipole-Dipole
Boiling point order is (III) $<$ (IV) $<$ (II) $<$ (I).

JEE - 2017

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317246 Assertion :
Inductive and electomeric effects require polar nature in the molecule.
Reason :
Polar nature in inductive effect is a must but not necessarily in electomeric effect.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317243 The correct order of increasing basicity of the given conjugate bases $(R = {CH}_{3})$ is

1

{RCOO}^{-} < H C \equiv C^{-} < R^{-} < N^{-} H_{2}

2

R^{-} < H C \equiv C^{-} < R C O O^{-} < N^{-} H_{2}

3

{RCOO}^{-} < N^{-} H_{2} < HC \equiv C^{-} < R^{-}

4

{RCOO}^{-} < HC \equiv C^{-} < N^{-} H_{2} < R^{-}

Explanation:

Increasing order of Basicity of conjugate base is $R C O O^{-} < C H \equiv C^{-} {< N H}_{2}^{-} < R^{-}$

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317244 Which among the following is incorrect statement?

1 Hydrogen ion

(H^{+})

shows negative electromeric effect.

2 Electromeric effect dominates over inductive effect.

3 The organic compound shows electromeric effect in the presence of the reagent only.

4 The electromeric effect is temporary effect.

Explanation:

$H^{+}$ shows positive electromeric effect. So, the correct option is (1).

JEE Main - 2024

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317258 Assertion :
Carbon-oxygen bonds are of equal length in carbonate ion.
Reason :
Bond length decreases with the multiplicity of bond between two atoms.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

${CO}_{3}^{2 -}$ shows resonance and thus all the three bonds are of identical bond length.
supporting img
As the no. of bonds between two atoms increase, bond length decrease. So both statements are true, but its not the correct reason. Thus, the option (2) is correct.

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317245 The increasing order of the boiling points for the following compounds is:
supporting img

1 (III)

<

(IV)

<

(II)

<

(I)

2 (IV)

<

(III)

<

(I)

<

(II)

3 (II)

<

(III)

<

(IV)

<

(I)

4 (III)

<

(II)

<

(I)

<

(IV)

Explanation:

(I) $C_{2} H_{5} OH$ : Hydrogen bonding >Dipole-Dipole
(II) Dipole-Dipole: $C_{2} H_{5} Cl$ is more polar than $C_{2} H_{5} {OCH}_{3}$ . So, Dipole-Dipole
$C_{2} H_{5} Cl >$ Dipole-Dipole $C_{2} H_{5} {OCH}_{3}$
(III) $C_{2} H_{5} {CH}_{3}$ : No hydrogen bonding and no dipole-dipole interaction
(IV) $C_{2} H_{5} {OCH}_{3}$ : Dipole-Dipole
Boiling point order is (III) $<$ (IV) $<$ (II) $<$ (I).

JEE - 2017

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317246 Assertion :
Inductive and electomeric effects require polar nature in the molecule.
Reason :
Polar nature in inductive effect is a must but not necessarily in electomeric effect.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317243 The correct order of increasing basicity of the given conjugate bases $(R = {CH}_{3})$ is

1

{RCOO}^{-} < H C \equiv C^{-} < R^{-} < N^{-} H_{2}

2

R^{-} < H C \equiv C^{-} < R C O O^{-} < N^{-} H_{2}

3

{RCOO}^{-} < N^{-} H_{2} < HC \equiv C^{-} < R^{-}

4

{RCOO}^{-} < HC \equiv C^{-} < N^{-} H_{2} < R^{-}

Explanation:

Increasing order of Basicity of conjugate base is $R C O O^{-} < C H \equiv C^{-} {< N H}_{2}^{-} < R^{-}$

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317244 Which among the following is incorrect statement?

1 Hydrogen ion

(H^{+})

shows negative electromeric effect.

2 Electromeric effect dominates over inductive effect.

3 The organic compound shows electromeric effect in the presence of the reagent only.

4 The electromeric effect is temporary effect.

Explanation:

$H^{+}$ shows positive electromeric effect. So, the correct option is (1).

JEE Main - 2024

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317258 Assertion :
Carbon-oxygen bonds are of equal length in carbonate ion.
Reason :
Bond length decreases with the multiplicity of bond between two atoms.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

${CO}_{3}^{2 -}$ shows resonance and thus all the three bonds are of identical bond length.
supporting img
As the no. of bonds between two atoms increase, bond length decrease. So both statements are true, but its not the correct reason. Thus, the option (2) is correct.

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317245 The increasing order of the boiling points for the following compounds is:
supporting img

1 (III)

<

(IV)

<

(II)

<

(I)

2 (IV)

<

(III)

<

(I)

<

(II)

3 (II)

<

(III)

<

(IV)

<

(I)

4 (III)

<

(II)

<

(I)

<

(IV)

Explanation:

(I) $C_{2} H_{5} OH$ : Hydrogen bonding >Dipole-Dipole
(II) Dipole-Dipole: $C_{2} H_{5} Cl$ is more polar than $C_{2} H_{5} {OCH}_{3}$ . So, Dipole-Dipole
$C_{2} H_{5} Cl >$ Dipole-Dipole $C_{2} H_{5} {OCH}_{3}$
(III) $C_{2} H_{5} {CH}_{3}$ : No hydrogen bonding and no dipole-dipole interaction
(IV) $C_{2} H_{5} {OCH}_{3}$ : Dipole-Dipole
Boiling point order is (III) $<$ (IV) $<$ (II) $<$ (I).

JEE - 2017

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317246 Assertion :
Inductive and electomeric effects require polar nature in the molecule.
Reason :
Polar nature in inductive effect is a must but not necessarily in electomeric effect.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317243 The correct order of increasing basicity of the given conjugate bases $(R = {CH}_{3})$ is

1

{RCOO}^{-} < H C \equiv C^{-} < R^{-} < N^{-} H_{2}

2

R^{-} < H C \equiv C^{-} < R C O O^{-} < N^{-} H_{2}

3

{RCOO}^{-} < N^{-} H_{2} < HC \equiv C^{-} < R^{-}

4

{RCOO}^{-} < HC \equiv C^{-} < N^{-} H_{2} < R^{-}

Explanation:

Increasing order of Basicity of conjugate base is $R C O O^{-} < C H \equiv C^{-} {< N H}_{2}^{-} < R^{-}$

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317244 Which among the following is incorrect statement?

1 Hydrogen ion

(H^{+})

shows negative electromeric effect.

2 Electromeric effect dominates over inductive effect.

3 The organic compound shows electromeric effect in the presence of the reagent only.

4 The electromeric effect is temporary effect.

Explanation:

$H^{+}$ shows positive electromeric effect. So, the correct option is (1).

JEE Main - 2024

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317258 Assertion :
Carbon-oxygen bonds are of equal length in carbonate ion.
Reason :
Bond length decreases with the multiplicity of bond between two atoms.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

${CO}_{3}^{2 -}$ shows resonance and thus all the three bonds are of identical bond length.
supporting img
As the no. of bonds between two atoms increase, bond length decrease. So both statements are true, but its not the correct reason. Thus, the option (2) is correct.

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317245 The increasing order of the boiling points for the following compounds is:
supporting img

1 (III)

<

(IV)

<

(II)

<

(I)

2 (IV)

<

(III)

<

(I)

<

(II)

3 (II)

<

(III)

<

(IV)

<

(I)

4 (III)

<

(II)

<

(I)

<

(IV)

Explanation:

(I) $C_{2} H_{5} OH$ : Hydrogen bonding >Dipole-Dipole
(II) Dipole-Dipole: $C_{2} H_{5} Cl$ is more polar than $C_{2} H_{5} {OCH}_{3}$ . So, Dipole-Dipole
$C_{2} H_{5} Cl >$ Dipole-Dipole $C_{2} H_{5} {OCH}_{3}$
(III) $C_{2} H_{5} {CH}_{3}$ : No hydrogen bonding and no dipole-dipole interaction
(IV) $C_{2} H_{5} {OCH}_{3}$ : Dipole-Dipole
Boiling point order is (III) $<$ (IV) $<$ (II) $<$ (I).

JEE - 2017

CHXI12:ORGANIC CHEMISTRY SOME BASIC PRINCIPLES AND TECHNIQUES

317246 Assertion :
Inductive and electomeric effects require polar nature in the molecule.
Reason :
Polar nature in inductive effect is a must but not necessarily in electomeric effect.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

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