278916
What will be the major product in the following mononitration reaction?
1
2
3
4
Explanation:
In activated ring electrophile attacks on ortho and para position and its reactivity is also higher than deactivating ring. Hence, electrophile $\left(\mathrm{NO}_{2}^{+}\right)$attacks at pare position and gives major product.
JEE Main 2019
AMINES
278944
Assertion : Aniline does not undergo FriedelCraft's reaction. Reason : $\mathrm{NH}_{2}$ group of aniline reacts with $\mathrm{AlCl}_{3}$ (Lewis acid) to give acid-base reaction.
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:
When aniline reacts with Lewis acid it gives acid - base reaction and the final product deactivates the ring for alkylation. Hence, both assertion and reason are correct and the reason is correct explanation of assertion.
AIIMS-2017
AMINES
278945
Assertion : Aniline is better nucleophile than anilinium ion. Reason : Anilinium ion have positive charge.
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:
Nucleophiles are electrons rich and having negatively charged while electrophiles are electron deficient and having positively charged . Aniline having lone pair while anilinium ion is positively charge which is electron deficient so anilinium ion is least basic than Aniline.
AIIMS-2017
AMINES
278953
The correct order of basicity of the following compounds is
1 $1<2<3<4$
2 $1<2<4<3$
3 $2<1<3<4$
4 $4<3<2<1$
Explanation:
Basicity depends upon lone pair donating tendency of nitrogen atom in amines. This is also basic form compound (iii) and (iv), (iv) is more basic due to presence of more nitrogen atom which is present in resonance. Basic strength \(\propto \frac{1}{\% \text { s character }}\) Therefore (i) is more basic than (ii) overall order of basicity:- \(2<1<3<4\)
WB-JEE-2016
AMINES
278956
Assertion : Acylation of amines gives a monosubstituted product whereas alkylation of amines gives polysubstituted product. Reason : Acyl group sterically hinders the approach of further acyl groups.
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:
Acylation of amines occurs at nitrogen so only monosubstituted product obtained. Alkylation of amine gives polysubstituted product. Hence, Only assertion is correct.
278916
What will be the major product in the following mononitration reaction?
1
2
3
4
Explanation:
In activated ring electrophile attacks on ortho and para position and its reactivity is also higher than deactivating ring. Hence, electrophile $\left(\mathrm{NO}_{2}^{+}\right)$attacks at pare position and gives major product.
JEE Main 2019
AMINES
278944
Assertion : Aniline does not undergo FriedelCraft's reaction. Reason : $\mathrm{NH}_{2}$ group of aniline reacts with $\mathrm{AlCl}_{3}$ (Lewis acid) to give acid-base reaction.
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:
When aniline reacts with Lewis acid it gives acid - base reaction and the final product deactivates the ring for alkylation. Hence, both assertion and reason are correct and the reason is correct explanation of assertion.
AIIMS-2017
AMINES
278945
Assertion : Aniline is better nucleophile than anilinium ion. Reason : Anilinium ion have positive charge.
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:
Nucleophiles are electrons rich and having negatively charged while electrophiles are electron deficient and having positively charged . Aniline having lone pair while anilinium ion is positively charge which is electron deficient so anilinium ion is least basic than Aniline.
AIIMS-2017
AMINES
278953
The correct order of basicity of the following compounds is
1 $1<2<3<4$
2 $1<2<4<3$
3 $2<1<3<4$
4 $4<3<2<1$
Explanation:
Basicity depends upon lone pair donating tendency of nitrogen atom in amines. This is also basic form compound (iii) and (iv), (iv) is more basic due to presence of more nitrogen atom which is present in resonance. Basic strength \(\propto \frac{1}{\% \text { s character }}\) Therefore (i) is more basic than (ii) overall order of basicity:- \(2<1<3<4\)
WB-JEE-2016
AMINES
278956
Assertion : Acylation of amines gives a monosubstituted product whereas alkylation of amines gives polysubstituted product. Reason : Acyl group sterically hinders the approach of further acyl groups.
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:
Acylation of amines occurs at nitrogen so only monosubstituted product obtained. Alkylation of amine gives polysubstituted product. Hence, Only assertion is correct.
278916
What will be the major product in the following mononitration reaction?
1
2
3
4
Explanation:
In activated ring electrophile attacks on ortho and para position and its reactivity is also higher than deactivating ring. Hence, electrophile $\left(\mathrm{NO}_{2}^{+}\right)$attacks at pare position and gives major product.
JEE Main 2019
AMINES
278944
Assertion : Aniline does not undergo FriedelCraft's reaction. Reason : $\mathrm{NH}_{2}$ group of aniline reacts with $\mathrm{AlCl}_{3}$ (Lewis acid) to give acid-base reaction.
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:
When aniline reacts with Lewis acid it gives acid - base reaction and the final product deactivates the ring for alkylation. Hence, both assertion and reason are correct and the reason is correct explanation of assertion.
AIIMS-2017
AMINES
278945
Assertion : Aniline is better nucleophile than anilinium ion. Reason : Anilinium ion have positive charge.
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:
Nucleophiles are electrons rich and having negatively charged while electrophiles are electron deficient and having positively charged . Aniline having lone pair while anilinium ion is positively charge which is electron deficient so anilinium ion is least basic than Aniline.
AIIMS-2017
AMINES
278953
The correct order of basicity of the following compounds is
1 $1<2<3<4$
2 $1<2<4<3$
3 $2<1<3<4$
4 $4<3<2<1$
Explanation:
Basicity depends upon lone pair donating tendency of nitrogen atom in amines. This is also basic form compound (iii) and (iv), (iv) is more basic due to presence of more nitrogen atom which is present in resonance. Basic strength \(\propto \frac{1}{\% \text { s character }}\) Therefore (i) is more basic than (ii) overall order of basicity:- \(2<1<3<4\)
WB-JEE-2016
AMINES
278956
Assertion : Acylation of amines gives a monosubstituted product whereas alkylation of amines gives polysubstituted product. Reason : Acyl group sterically hinders the approach of further acyl groups.
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:
Acylation of amines occurs at nitrogen so only monosubstituted product obtained. Alkylation of amine gives polysubstituted product. Hence, Only assertion is correct.
278916
What will be the major product in the following mononitration reaction?
1
2
3
4
Explanation:
In activated ring electrophile attacks on ortho and para position and its reactivity is also higher than deactivating ring. Hence, electrophile $\left(\mathrm{NO}_{2}^{+}\right)$attacks at pare position and gives major product.
JEE Main 2019
AMINES
278944
Assertion : Aniline does not undergo FriedelCraft's reaction. Reason : $\mathrm{NH}_{2}$ group of aniline reacts with $\mathrm{AlCl}_{3}$ (Lewis acid) to give acid-base reaction.
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:
When aniline reacts with Lewis acid it gives acid - base reaction and the final product deactivates the ring for alkylation. Hence, both assertion and reason are correct and the reason is correct explanation of assertion.
AIIMS-2017
AMINES
278945
Assertion : Aniline is better nucleophile than anilinium ion. Reason : Anilinium ion have positive charge.
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:
Nucleophiles are electrons rich and having negatively charged while electrophiles are electron deficient and having positively charged . Aniline having lone pair while anilinium ion is positively charge which is electron deficient so anilinium ion is least basic than Aniline.
AIIMS-2017
AMINES
278953
The correct order of basicity of the following compounds is
1 $1<2<3<4$
2 $1<2<4<3$
3 $2<1<3<4$
4 $4<3<2<1$
Explanation:
Basicity depends upon lone pair donating tendency of nitrogen atom in amines. This is also basic form compound (iii) and (iv), (iv) is more basic due to presence of more nitrogen atom which is present in resonance. Basic strength \(\propto \frac{1}{\% \text { s character }}\) Therefore (i) is more basic than (ii) overall order of basicity:- \(2<1<3<4\)
WB-JEE-2016
AMINES
278956
Assertion : Acylation of amines gives a monosubstituted product whereas alkylation of amines gives polysubstituted product. Reason : Acyl group sterically hinders the approach of further acyl groups.
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:
Acylation of amines occurs at nitrogen so only monosubstituted product obtained. Alkylation of amine gives polysubstituted product. Hence, Only assertion is correct.
278916
What will be the major product in the following mononitration reaction?
1
2
3
4
Explanation:
In activated ring electrophile attacks on ortho and para position and its reactivity is also higher than deactivating ring. Hence, electrophile $\left(\mathrm{NO}_{2}^{+}\right)$attacks at pare position and gives major product.
JEE Main 2019
AMINES
278944
Assertion : Aniline does not undergo FriedelCraft's reaction. Reason : $\mathrm{NH}_{2}$ group of aniline reacts with $\mathrm{AlCl}_{3}$ (Lewis acid) to give acid-base reaction.
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:
When aniline reacts with Lewis acid it gives acid - base reaction and the final product deactivates the ring for alkylation. Hence, both assertion and reason are correct and the reason is correct explanation of assertion.
AIIMS-2017
AMINES
278945
Assertion : Aniline is better nucleophile than anilinium ion. Reason : Anilinium ion have positive charge.
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:
Nucleophiles are electrons rich and having negatively charged while electrophiles are electron deficient and having positively charged . Aniline having lone pair while anilinium ion is positively charge which is electron deficient so anilinium ion is least basic than Aniline.
AIIMS-2017
AMINES
278953
The correct order of basicity of the following compounds is
1 $1<2<3<4$
2 $1<2<4<3$
3 $2<1<3<4$
4 $4<3<2<1$
Explanation:
Basicity depends upon lone pair donating tendency of nitrogen atom in amines. This is also basic form compound (iii) and (iv), (iv) is more basic due to presence of more nitrogen atom which is present in resonance. Basic strength \(\propto \frac{1}{\% \text { s character }}\) Therefore (i) is more basic than (ii) overall order of basicity:- \(2<1<3<4\)
WB-JEE-2016
AMINES
278956
Assertion : Acylation of amines gives a monosubstituted product whereas alkylation of amines gives polysubstituted product. Reason : Acyl group sterically hinders the approach of further acyl groups.
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:
Acylation of amines occurs at nitrogen so only monosubstituted product obtained. Alkylation of amine gives polysubstituted product. Hence, Only assertion is correct.
