NEET Test Series from KOTA - 10 Papers In MS WORD
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AMINES
278932
The major product of the following reaction is
1
2
3
4
Explanation:
This is an example of diazotisation reaction. \(\mathrm{CrO}_3 / \mathrm{H}^{+}\)is Jones reagent which converts alcohol in carboxylic acids. Concentrated \(\mathrm{H}_2 \mathrm{SO}_4\) is used for hydrolysis of esters and for alcohol and carboxylic acids.
JEE Main - 2018
AMINES
278935
Assertion : Pyridine is more basic than pyrrole. Reason : Lone pair of electrons on $\mathrm{N}$ in pyridine and pyrrole are different in nature, these form a part of aromatic sextet in pyrrole, while not in pyridine.
1 If both Assertion and Reason are correct and the Reason is a 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 $\mathrm{R}$ is incorrect.
4 If both Assertion and Reaction are incorrect.
Explanation:
In pyrrole lone pair on $\mathrm{N}$ participate in resonance due to which pyrrole become aromatic nature. Therefore pyrrole is less basic than pyridine.
2018 (M)]**
AMINES
278936
Assertion : N, N-Diethylethanamine is more basic than N, N-Dimethylmethanamine Reason : + I effect of ethyl is more than methyl.
1 If both Assertion and Reason are correct and the Reason is a 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 R is incorrect.
4 If both Assertion and Reaction are incorrect.
Explanation:
$\mathrm{N}, \mathrm{N}$ - diethyl ethanamine $\quad \mathrm{N}, \mathrm{N}$ - dimethyl methanamine BasicStrengh $\propto \frac{+\mathrm{M}|+\mathrm{I}|+\mathrm{H} \text { effect }}{-\mathrm{M}|-\mathrm{H}|-\mathrm{I} \text { effect }}$ In above example $\mathrm{C}_{2} \mathrm{H}_{5}$ having more $+\mathrm{I}$ effect than $\mathrm{CH}_{3}$ group therefore electron density on N,N diethylethanamine is more So, it is also more basic than N,N- dimethyl methanamine.
2018 (E)]**
AMINES
278937
The product $\mathbf{Y}$ for the below reaction is
1
2
3
4
5
Explanation:
This reaction is known as carbylamines test which is used in separation of primary amines and aniline.
278932
The major product of the following reaction is
1
2
3
4
Explanation:
This is an example of diazotisation reaction. \(\mathrm{CrO}_3 / \mathrm{H}^{+}\)is Jones reagent which converts alcohol in carboxylic acids. Concentrated \(\mathrm{H}_2 \mathrm{SO}_4\) is used for hydrolysis of esters and for alcohol and carboxylic acids.
JEE Main - 2018
AMINES
278935
Assertion : Pyridine is more basic than pyrrole. Reason : Lone pair of electrons on $\mathrm{N}$ in pyridine and pyrrole are different in nature, these form a part of aromatic sextet in pyrrole, while not in pyridine.
1 If both Assertion and Reason are correct and the Reason is a 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 $\mathrm{R}$ is incorrect.
4 If both Assertion and Reaction are incorrect.
Explanation:
In pyrrole lone pair on $\mathrm{N}$ participate in resonance due to which pyrrole become aromatic nature. Therefore pyrrole is less basic than pyridine.
2018 (M)]**
AMINES
278936
Assertion : N, N-Diethylethanamine is more basic than N, N-Dimethylmethanamine Reason : + I effect of ethyl is more than methyl.
1 If both Assertion and Reason are correct and the Reason is a 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 R is incorrect.
4 If both Assertion and Reaction are incorrect.
Explanation:
$\mathrm{N}, \mathrm{N}$ - diethyl ethanamine $\quad \mathrm{N}, \mathrm{N}$ - dimethyl methanamine BasicStrengh $\propto \frac{+\mathrm{M}|+\mathrm{I}|+\mathrm{H} \text { effect }}{-\mathrm{M}|-\mathrm{H}|-\mathrm{I} \text { effect }}$ In above example $\mathrm{C}_{2} \mathrm{H}_{5}$ having more $+\mathrm{I}$ effect than $\mathrm{CH}_{3}$ group therefore electron density on N,N diethylethanamine is more So, it is also more basic than N,N- dimethyl methanamine.
2018 (E)]**
AMINES
278937
The product $\mathbf{Y}$ for the below reaction is
1
2
3
4
5
Explanation:
This reaction is known as carbylamines test which is used in separation of primary amines and aniline.
278932
The major product of the following reaction is
1
2
3
4
Explanation:
This is an example of diazotisation reaction. \(\mathrm{CrO}_3 / \mathrm{H}^{+}\)is Jones reagent which converts alcohol in carboxylic acids. Concentrated \(\mathrm{H}_2 \mathrm{SO}_4\) is used for hydrolysis of esters and for alcohol and carboxylic acids.
JEE Main - 2018
AMINES
278935
Assertion : Pyridine is more basic than pyrrole. Reason : Lone pair of electrons on $\mathrm{N}$ in pyridine and pyrrole are different in nature, these form a part of aromatic sextet in pyrrole, while not in pyridine.
1 If both Assertion and Reason are correct and the Reason is a 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 $\mathrm{R}$ is incorrect.
4 If both Assertion and Reaction are incorrect.
Explanation:
In pyrrole lone pair on $\mathrm{N}$ participate in resonance due to which pyrrole become aromatic nature. Therefore pyrrole is less basic than pyridine.
2018 (M)]**
AMINES
278936
Assertion : N, N-Diethylethanamine is more basic than N, N-Dimethylmethanamine Reason : + I effect of ethyl is more than methyl.
1 If both Assertion and Reason are correct and the Reason is a 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 R is incorrect.
4 If both Assertion and Reaction are incorrect.
Explanation:
$\mathrm{N}, \mathrm{N}$ - diethyl ethanamine $\quad \mathrm{N}, \mathrm{N}$ - dimethyl methanamine BasicStrengh $\propto \frac{+\mathrm{M}|+\mathrm{I}|+\mathrm{H} \text { effect }}{-\mathrm{M}|-\mathrm{H}|-\mathrm{I} \text { effect }}$ In above example $\mathrm{C}_{2} \mathrm{H}_{5}$ having more $+\mathrm{I}$ effect than $\mathrm{CH}_{3}$ group therefore electron density on N,N diethylethanamine is more So, it is also more basic than N,N- dimethyl methanamine.
2018 (E)]**
AMINES
278937
The product $\mathbf{Y}$ for the below reaction is
1
2
3
4
5
Explanation:
This reaction is known as carbylamines test which is used in separation of primary amines and aniline.
NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
AMINES
278932
The major product of the following reaction is
1
2
3
4
Explanation:
This is an example of diazotisation reaction. \(\mathrm{CrO}_3 / \mathrm{H}^{+}\)is Jones reagent which converts alcohol in carboxylic acids. Concentrated \(\mathrm{H}_2 \mathrm{SO}_4\) is used for hydrolysis of esters and for alcohol and carboxylic acids.
JEE Main - 2018
AMINES
278935
Assertion : Pyridine is more basic than pyrrole. Reason : Lone pair of electrons on $\mathrm{N}$ in pyridine and pyrrole are different in nature, these form a part of aromatic sextet in pyrrole, while not in pyridine.
1 If both Assertion and Reason are correct and the Reason is a 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 $\mathrm{R}$ is incorrect.
4 If both Assertion and Reaction are incorrect.
Explanation:
In pyrrole lone pair on $\mathrm{N}$ participate in resonance due to which pyrrole become aromatic nature. Therefore pyrrole is less basic than pyridine.
2018 (M)]**
AMINES
278936
Assertion : N, N-Diethylethanamine is more basic than N, N-Dimethylmethanamine Reason : + I effect of ethyl is more than methyl.
1 If both Assertion and Reason are correct and the Reason is a 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 R is incorrect.
4 If both Assertion and Reaction are incorrect.
Explanation:
$\mathrm{N}, \mathrm{N}$ - diethyl ethanamine $\quad \mathrm{N}, \mathrm{N}$ - dimethyl methanamine BasicStrengh $\propto \frac{+\mathrm{M}|+\mathrm{I}|+\mathrm{H} \text { effect }}{-\mathrm{M}|-\mathrm{H}|-\mathrm{I} \text { effect }}$ In above example $\mathrm{C}_{2} \mathrm{H}_{5}$ having more $+\mathrm{I}$ effect than $\mathrm{CH}_{3}$ group therefore electron density on N,N diethylethanamine is more So, it is also more basic than N,N- dimethyl methanamine.
2018 (E)]**
AMINES
278937
The product $\mathbf{Y}$ for the below reaction is
1
2
3
4
5
Explanation:
This reaction is known as carbylamines test which is used in separation of primary amines and aniline.
