QBManager

GENERAL ORGANIC CHEMISTRY

231258 Arrangement of following compounds based on their boiling points in the increasing order: n-butane, 1-butanol, ethoxyethane and 1propanol will be

1 1-propanol

>

n-butane

>

ethoxyethane

> 1

- butanol

2 n-butane

<

ethoxyethane

< 1

-propanol

< 1

- butanol

3 n-butane

< 1

-propanol

<

ethoxyethane

< 1

- butanol

4 1-propanol

<

n-butane

<

ethoxyethane

< 1

- butanol.

Explanation:

As we know that boiling point increases with increase in molecular masses due to which 1-butanol has higher boiling point than 1-propanol. Ethers do not form hydrogen bonds. Thus they have lower boiling point than the corresponding alcohols due to weak dipole-dipole interaction. The boiling point of lower ethers is only slightly higher than those of the n-alkanes. Thus, the increasing order of boiling points is n-butane < ethoxyethane $< 1$ -propanol $< 1$ -butanol.

COMEDK 2014

GENERAL ORGANIC CHEMISTRY

231267 ${({CH}_{3})}_{4} N^{+}$ is neither an electrophile, nor a nucleophile because it

1 does not have electron pair for donation as well as cannot attract electron pair

2 neither has electron pair available for donation nor can accommodate electron since all shells of nitrogen are fully occupied

3 can act as Lewis acid and base

4 none of these

Explanation:

${({CH}_{3})}_{4} N^{+}$ is neither an electrophile nor a nucleophile because no electron pairs available for donation nor can accommodate electron. Since all shells of nitrogen are fully occupied.

COMEDK 2017

GENERAL ORGANIC CHEMISTRY

231317 Acetic acid is less acidic than formic acid because of the

1 inductive effect of

- {CH}_{3}

groups

2 steric effect of

- {CH}_{3}

groups

3 electron attracting nature of

- {CH}_{3}

groups

4 resonance effect of

- {CH}_{3}

group.

Explanation:

Acetic acid $({CH}_{3} COOH)$ is less acidic than formic acid $(HCOOH)$ because of the inductive effect of $- {CH}_{3}$ group.

SRMJEEE - 2009

GENERAL ORGANIC CHEMISTRY

231278 **Assertion:** Pyridine is more basic than Pyrrole.
Reason: In Pyrrole, nitrogen has ${sp}^{2}$ hybridisation and the lone pair of nitrogen is not available for donation.

1 If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.

3 If Assertion is correct but Reason is incorrect.

4 If both the Assertion and Reason are incorrect.

Explanation:

(A): Pyridine is more basic than Pyrrole reason behind it is that lone pair of electron on $N$ in pyridine and Pyrrole are different in nature. Electron pair availability shows strength of basicity.

AIIMS 26 May 2019 (Evening)

GENERAL ORGANIC CHEMISTRY

231303 Which one of the statements about ${HOH}_{2} C C H (OH) CHO$ is not correct? It

1 is an isomer of 1,3-dihydroxypropanone.

2 contains a tertiary alcoholic group.

3 has the same empirical formula as glucose.

4 can show optical isomerism.

Explanation:

(B): It has $1^{\circ}$ and $2^{\circ}$ alcoholic group, but no $3^{\circ}$ .

AIIMS-2013

GENERAL ORGANIC CHEMISTRY

231258 Arrangement of following compounds based on their boiling points in the increasing order: n-butane, 1-butanol, ethoxyethane and 1propanol will be

1 1-propanol

>

n-butane

>

ethoxyethane

> 1

- butanol

2 n-butane

<

ethoxyethane

< 1

-propanol

< 1

- butanol

3 n-butane

< 1

-propanol

<

ethoxyethane

< 1

- butanol

4 1-propanol

<

n-butane

<

ethoxyethane

< 1

- butanol.

Explanation:

As we know that boiling point increases with increase in molecular masses due to which 1-butanol has higher boiling point than 1-propanol. Ethers do not form hydrogen bonds. Thus they have lower boiling point than the corresponding alcohols due to weak dipole-dipole interaction. The boiling point of lower ethers is only slightly higher than those of the n-alkanes. Thus, the increasing order of boiling points is n-butane < ethoxyethane $< 1$ -propanol $< 1$ -butanol.

COMEDK 2014

GENERAL ORGANIC CHEMISTRY

231267 ${({CH}_{3})}_{4} N^{+}$ is neither an electrophile, nor a nucleophile because it

1 does not have electron pair for donation as well as cannot attract electron pair

2 neither has electron pair available for donation nor can accommodate electron since all shells of nitrogen are fully occupied

3 can act as Lewis acid and base

4 none of these

Explanation:

${({CH}_{3})}_{4} N^{+}$ is neither an electrophile nor a nucleophile because no electron pairs available for donation nor can accommodate electron. Since all shells of nitrogen are fully occupied.

COMEDK 2017

GENERAL ORGANIC CHEMISTRY

231317 Acetic acid is less acidic than formic acid because of the

1 inductive effect of

- {CH}_{3}

groups

2 steric effect of

- {CH}_{3}

groups

3 electron attracting nature of

- {CH}_{3}

groups

4 resonance effect of

- {CH}_{3}

group.

Explanation:

Acetic acid $({CH}_{3} COOH)$ is less acidic than formic acid $(HCOOH)$ because of the inductive effect of $- {CH}_{3}$ group.

SRMJEEE - 2009

GENERAL ORGANIC CHEMISTRY

231278 **Assertion:** Pyridine is more basic than Pyrrole.
Reason: In Pyrrole, nitrogen has ${sp}^{2}$ hybridisation and the lone pair of nitrogen is not available for donation.

1 If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.

3 If Assertion is correct but Reason is incorrect.

4 If both the Assertion and Reason are incorrect.

Explanation:

(A): Pyridine is more basic than Pyrrole reason behind it is that lone pair of electron on $N$ in pyridine and Pyrrole are different in nature. Electron pair availability shows strength of basicity.

AIIMS 26 May 2019 (Evening)

GENERAL ORGANIC CHEMISTRY

231303 Which one of the statements about ${HOH}_{2} C C H (OH) CHO$ is not correct? It

1 is an isomer of 1,3-dihydroxypropanone.

2 contains a tertiary alcoholic group.

3 has the same empirical formula as glucose.

4 can show optical isomerism.

Explanation:

(B): It has $1^{\circ}$ and $2^{\circ}$ alcoholic group, but no $3^{\circ}$ .

AIIMS-2013

GENERAL ORGANIC CHEMISTRY

231258 Arrangement of following compounds based on their boiling points in the increasing order: n-butane, 1-butanol, ethoxyethane and 1propanol will be

1 1-propanol

>

n-butane

>

ethoxyethane

> 1

- butanol

2 n-butane

<

ethoxyethane

< 1

-propanol

< 1

- butanol

3 n-butane

< 1

-propanol

<

ethoxyethane

< 1

- butanol

4 1-propanol

<

n-butane

<

ethoxyethane

< 1

- butanol.

Explanation:

As we know that boiling point increases with increase in molecular masses due to which 1-butanol has higher boiling point than 1-propanol. Ethers do not form hydrogen bonds. Thus they have lower boiling point than the corresponding alcohols due to weak dipole-dipole interaction. The boiling point of lower ethers is only slightly higher than those of the n-alkanes. Thus, the increasing order of boiling points is n-butane < ethoxyethane $< 1$ -propanol $< 1$ -butanol.

COMEDK 2014

GENERAL ORGANIC CHEMISTRY

231267 ${({CH}_{3})}_{4} N^{+}$ is neither an electrophile, nor a nucleophile because it

1 does not have electron pair for donation as well as cannot attract electron pair

2 neither has electron pair available for donation nor can accommodate electron since all shells of nitrogen are fully occupied

3 can act as Lewis acid and base

4 none of these

Explanation:

${({CH}_{3})}_{4} N^{+}$ is neither an electrophile nor a nucleophile because no electron pairs available for donation nor can accommodate electron. Since all shells of nitrogen are fully occupied.

COMEDK 2017

GENERAL ORGANIC CHEMISTRY

231317 Acetic acid is less acidic than formic acid because of the

1 inductive effect of

- {CH}_{3}

groups

2 steric effect of

- {CH}_{3}

groups

3 electron attracting nature of

- {CH}_{3}

groups

4 resonance effect of

- {CH}_{3}

group.

Explanation:

Acetic acid $({CH}_{3} COOH)$ is less acidic than formic acid $(HCOOH)$ because of the inductive effect of $- {CH}_{3}$ group.

SRMJEEE - 2009

GENERAL ORGANIC CHEMISTRY

231278 **Assertion:** Pyridine is more basic than Pyrrole.
Reason: In Pyrrole, nitrogen has ${sp}^{2}$ hybridisation and the lone pair of nitrogen is not available for donation.

1 If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.

3 If Assertion is correct but Reason is incorrect.

4 If both the Assertion and Reason are incorrect.

Explanation:

(A): Pyridine is more basic than Pyrrole reason behind it is that lone pair of electron on $N$ in pyridine and Pyrrole are different in nature. Electron pair availability shows strength of basicity.

AIIMS 26 May 2019 (Evening)

GENERAL ORGANIC CHEMISTRY

231303 Which one of the statements about ${HOH}_{2} C C H (OH) CHO$ is not correct? It

1 is an isomer of 1,3-dihydroxypropanone.

2 contains a tertiary alcoholic group.

3 has the same empirical formula as glucose.

4 can show optical isomerism.

Explanation:

(B): It has $1^{\circ}$ and $2^{\circ}$ alcoholic group, but no $3^{\circ}$ .

AIIMS-2013

GENERAL ORGANIC CHEMISTRY

231258 Arrangement of following compounds based on their boiling points in the increasing order: n-butane, 1-butanol, ethoxyethane and 1propanol will be

1 1-propanol

>

n-butane

>

ethoxyethane

> 1

- butanol

2 n-butane

<

ethoxyethane

< 1

-propanol

< 1

- butanol

3 n-butane

< 1

-propanol

<

ethoxyethane

< 1

- butanol

4 1-propanol

<

n-butane

<

ethoxyethane

< 1

- butanol.

Explanation:

As we know that boiling point increases with increase in molecular masses due to which 1-butanol has higher boiling point than 1-propanol. Ethers do not form hydrogen bonds. Thus they have lower boiling point than the corresponding alcohols due to weak dipole-dipole interaction. The boiling point of lower ethers is only slightly higher than those of the n-alkanes. Thus, the increasing order of boiling points is n-butane < ethoxyethane $< 1$ -propanol $< 1$ -butanol.

COMEDK 2014

GENERAL ORGANIC CHEMISTRY

231267 ${({CH}_{3})}_{4} N^{+}$ is neither an electrophile, nor a nucleophile because it

1 does not have electron pair for donation as well as cannot attract electron pair

2 neither has electron pair available for donation nor can accommodate electron since all shells of nitrogen are fully occupied

3 can act as Lewis acid and base

4 none of these

Explanation:

${({CH}_{3})}_{4} N^{+}$ is neither an electrophile nor a nucleophile because no electron pairs available for donation nor can accommodate electron. Since all shells of nitrogen are fully occupied.

COMEDK 2017

GENERAL ORGANIC CHEMISTRY

231317 Acetic acid is less acidic than formic acid because of the

1 inductive effect of

- {CH}_{3}

groups

2 steric effect of

- {CH}_{3}

groups

3 electron attracting nature of

- {CH}_{3}

groups

4 resonance effect of

- {CH}_{3}

group.

Explanation:

Acetic acid $({CH}_{3} COOH)$ is less acidic than formic acid $(HCOOH)$ because of the inductive effect of $- {CH}_{3}$ group.

SRMJEEE - 2009

GENERAL ORGANIC CHEMISTRY

231278 **Assertion:** Pyridine is more basic than Pyrrole.
Reason: In Pyrrole, nitrogen has ${sp}^{2}$ hybridisation and the lone pair of nitrogen is not available for donation.

1 If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.

3 If Assertion is correct but Reason is incorrect.

4 If both the Assertion and Reason are incorrect.

Explanation:

(A): Pyridine is more basic than Pyrrole reason behind it is that lone pair of electron on $N$ in pyridine and Pyrrole are different in nature. Electron pair availability shows strength of basicity.

AIIMS 26 May 2019 (Evening)

GENERAL ORGANIC CHEMISTRY

231303 Which one of the statements about ${HOH}_{2} C C H (OH) CHO$ is not correct? It

1 is an isomer of 1,3-dihydroxypropanone.

2 contains a tertiary alcoholic group.

3 has the same empirical formula as glucose.

4 can show optical isomerism.

Explanation:

(B): It has $1^{\circ}$ and $2^{\circ}$ alcoholic group, but no $3^{\circ}$ .

AIIMS-2013

GENERAL ORGANIC CHEMISTRY

231258 Arrangement of following compounds based on their boiling points in the increasing order: n-butane, 1-butanol, ethoxyethane and 1propanol will be

1 1-propanol

>

n-butane

>

ethoxyethane

> 1

- butanol

2 n-butane

<

ethoxyethane

< 1

-propanol

< 1

- butanol

3 n-butane

< 1

-propanol

<

ethoxyethane

< 1

- butanol

4 1-propanol

<

n-butane

<

ethoxyethane

< 1

- butanol.

Explanation:

As we know that boiling point increases with increase in molecular masses due to which 1-butanol has higher boiling point than 1-propanol. Ethers do not form hydrogen bonds. Thus they have lower boiling point than the corresponding alcohols due to weak dipole-dipole interaction. The boiling point of lower ethers is only slightly higher than those of the n-alkanes. Thus, the increasing order of boiling points is n-butane < ethoxyethane $< 1$ -propanol $< 1$ -butanol.

COMEDK 2014

GENERAL ORGANIC CHEMISTRY

231267 ${({CH}_{3})}_{4} N^{+}$ is neither an electrophile, nor a nucleophile because it

1 does not have electron pair for donation as well as cannot attract electron pair

2 neither has electron pair available for donation nor can accommodate electron since all shells of nitrogen are fully occupied

3 can act as Lewis acid and base

4 none of these

Explanation:

${({CH}_{3})}_{4} N^{+}$ is neither an electrophile nor a nucleophile because no electron pairs available for donation nor can accommodate electron. Since all shells of nitrogen are fully occupied.

COMEDK 2017

GENERAL ORGANIC CHEMISTRY

231317 Acetic acid is less acidic than formic acid because of the

1 inductive effect of

- {CH}_{3}

groups

2 steric effect of

- {CH}_{3}

groups

3 electron attracting nature of

- {CH}_{3}

groups

4 resonance effect of

- {CH}_{3}

group.

Explanation:

Acetic acid $({CH}_{3} COOH)$ is less acidic than formic acid $(HCOOH)$ because of the inductive effect of $- {CH}_{3}$ group.

SRMJEEE - 2009

GENERAL ORGANIC CHEMISTRY

231278 **Assertion:** Pyridine is more basic than Pyrrole.
Reason: In Pyrrole, nitrogen has ${sp}^{2}$ hybridisation and the lone pair of nitrogen is not available for donation.

1 If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.

3 If Assertion is correct but Reason is incorrect.

4 If both the Assertion and Reason are incorrect.

Explanation:

(A): Pyridine is more basic than Pyrrole reason behind it is that lone pair of electron on $N$ in pyridine and Pyrrole are different in nature. Electron pair availability shows strength of basicity.

AIIMS 26 May 2019 (Evening)

GENERAL ORGANIC CHEMISTRY

231303 Which one of the statements about ${HOH}_{2} C C H (OH) CHO$ is not correct? It

1 is an isomer of 1,3-dihydroxypropanone.

2 contains a tertiary alcoholic group.

3 has the same empirical formula as glucose.

4 can show optical isomerism.

Explanation:

(B): It has $1^{\circ}$ and $2^{\circ}$ alcoholic group, but no $3^{\circ}$ .

AIIMS-2013

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Question Bank Series

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation:

Explanation: