278804
In the following reaction sequence,
the major product $B$ is :
1
2
3
4
Explanation:
In $2^{\text {nd }}$ step because of protection of aniline only monobromination occurs.
JEE Main 2020
AMINES
278805
What will be the product $A$ in the reaction given below ?
1
2
3
4
Explanation:
Ortho para-directing for electrophilic substitution as para is blocked by $-\mathrm{NO}_{2}$ $\mathrm{NO}_{2}$ will come at ortho w.r.t. $-\mathrm{CH}_{3}$
AP EAMCET (Engg.) 18.09.2020 Shift-I
AMINES
278808
The increasing order of reactivity of the following compounds towards reaction with alkyl halides directly is
(A) (B) (C) (D)
1 (A) $<$ (C) $<$ (D) $<$ (B)
2 (B) $<$ (A) $<$ (C) $<$ (D)
3 (B) $<$ (A) $<$ (D) $<$ (C)
4 (A) $<$ (B) $<$ (C) $<$ (D)
Explanation:
Rate of electrophilic substitution reaction depends on the nucleophilicity of benzene derivatives i.e., In case of (C) and (D) compound, (D) shows $+\mathrm{M}$ effect greater than (C) because (C) also contains $-\mathrm{M}$ effect so its nucleophilicity decreases therefore, rate of alkyl halide in $(\mathrm{C})$ is decreases.
Rate :- $(\mathrm{C})<(\mathrm{D})$
In case of (A) and (B), (B) contains more $-\mathrm{M}$ containing group then rate in (B) is lesser than (A)
Rate :- $(\mathrm{A})>(\mathrm{B})$
Overall Rate of alkyl halide substitution reaction is
$\text { (D) }>\text { (C) }>\text { (A) }>\text { (B) }$
JEE Main 2019
AMINES
278811
Assertion: Benzylamine is more basic than ethylamine Reason: Benzene shows + I effect.
1 If both Assertion and Reason are correct and the Reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason 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:
In case of benzylamine, benzene shows - I effect where as in ethylamine, ethyl group shows $+\mathrm{I}$ effect. $+\mathrm{I}$ effect increases basic strength increases. Hence, ethylamine is more basic than benzylamine.
278804
In the following reaction sequence,
the major product $B$ is :
1
2
3
4
Explanation:
In $2^{\text {nd }}$ step because of protection of aniline only monobromination occurs.
JEE Main 2020
AMINES
278805
What will be the product $A$ in the reaction given below ?
1
2
3
4
Explanation:
Ortho para-directing for electrophilic substitution as para is blocked by $-\mathrm{NO}_{2}$ $\mathrm{NO}_{2}$ will come at ortho w.r.t. $-\mathrm{CH}_{3}$
AP EAMCET (Engg.) 18.09.2020 Shift-I
AMINES
278808
The increasing order of reactivity of the following compounds towards reaction with alkyl halides directly is
(A) (B) (C) (D)
1 (A) $<$ (C) $<$ (D) $<$ (B)
2 (B) $<$ (A) $<$ (C) $<$ (D)
3 (B) $<$ (A) $<$ (D) $<$ (C)
4 (A) $<$ (B) $<$ (C) $<$ (D)
Explanation:
Rate of electrophilic substitution reaction depends on the nucleophilicity of benzene derivatives i.e., In case of (C) and (D) compound, (D) shows $+\mathrm{M}$ effect greater than (C) because (C) also contains $-\mathrm{M}$ effect so its nucleophilicity decreases therefore, rate of alkyl halide in $(\mathrm{C})$ is decreases.
Rate :- $(\mathrm{C})<(\mathrm{D})$
In case of (A) and (B), (B) contains more $-\mathrm{M}$ containing group then rate in (B) is lesser than (A)
Rate :- $(\mathrm{A})>(\mathrm{B})$
Overall Rate of alkyl halide substitution reaction is
$\text { (D) }>\text { (C) }>\text { (A) }>\text { (B) }$
JEE Main 2019
AMINES
278811
Assertion: Benzylamine is more basic than ethylamine Reason: Benzene shows + I effect.
1 If both Assertion and Reason are correct and the Reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason 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:
In case of benzylamine, benzene shows - I effect where as in ethylamine, ethyl group shows $+\mathrm{I}$ effect. $+\mathrm{I}$ effect increases basic strength increases. Hence, ethylamine is more basic than benzylamine.
278804
In the following reaction sequence,
the major product $B$ is :
1
2
3
4
Explanation:
In $2^{\text {nd }}$ step because of protection of aniline only monobromination occurs.
JEE Main 2020
AMINES
278805
What will be the product $A$ in the reaction given below ?
1
2
3
4
Explanation:
Ortho para-directing for electrophilic substitution as para is blocked by $-\mathrm{NO}_{2}$ $\mathrm{NO}_{2}$ will come at ortho w.r.t. $-\mathrm{CH}_{3}$
AP EAMCET (Engg.) 18.09.2020 Shift-I
AMINES
278808
The increasing order of reactivity of the following compounds towards reaction with alkyl halides directly is
(A) (B) (C) (D)
1 (A) $<$ (C) $<$ (D) $<$ (B)
2 (B) $<$ (A) $<$ (C) $<$ (D)
3 (B) $<$ (A) $<$ (D) $<$ (C)
4 (A) $<$ (B) $<$ (C) $<$ (D)
Explanation:
Rate of electrophilic substitution reaction depends on the nucleophilicity of benzene derivatives i.e., In case of (C) and (D) compound, (D) shows $+\mathrm{M}$ effect greater than (C) because (C) also contains $-\mathrm{M}$ effect so its nucleophilicity decreases therefore, rate of alkyl halide in $(\mathrm{C})$ is decreases.
Rate :- $(\mathrm{C})<(\mathrm{D})$
In case of (A) and (B), (B) contains more $-\mathrm{M}$ containing group then rate in (B) is lesser than (A)
Rate :- $(\mathrm{A})>(\mathrm{B})$
Overall Rate of alkyl halide substitution reaction is
$\text { (D) }>\text { (C) }>\text { (A) }>\text { (B) }$
JEE Main 2019
AMINES
278811
Assertion: Benzylamine is more basic than ethylamine Reason: Benzene shows + I effect.
1 If both Assertion and Reason are correct and the Reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason 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:
In case of benzylamine, benzene shows - I effect where as in ethylamine, ethyl group shows $+\mathrm{I}$ effect. $+\mathrm{I}$ effect increases basic strength increases. Hence, ethylamine is more basic than benzylamine.
278804
In the following reaction sequence,
the major product $B$ is :
1
2
3
4
Explanation:
In $2^{\text {nd }}$ step because of protection of aniline only monobromination occurs.
JEE Main 2020
AMINES
278805
What will be the product $A$ in the reaction given below ?
1
2
3
4
Explanation:
Ortho para-directing for electrophilic substitution as para is blocked by $-\mathrm{NO}_{2}$ $\mathrm{NO}_{2}$ will come at ortho w.r.t. $-\mathrm{CH}_{3}$
AP EAMCET (Engg.) 18.09.2020 Shift-I
AMINES
278808
The increasing order of reactivity of the following compounds towards reaction with alkyl halides directly is
(A) (B) (C) (D)
1 (A) $<$ (C) $<$ (D) $<$ (B)
2 (B) $<$ (A) $<$ (C) $<$ (D)
3 (B) $<$ (A) $<$ (D) $<$ (C)
4 (A) $<$ (B) $<$ (C) $<$ (D)
Explanation:
Rate of electrophilic substitution reaction depends on the nucleophilicity of benzene derivatives i.e., In case of (C) and (D) compound, (D) shows $+\mathrm{M}$ effect greater than (C) because (C) also contains $-\mathrm{M}$ effect so its nucleophilicity decreases therefore, rate of alkyl halide in $(\mathrm{C})$ is decreases.
Rate :- $(\mathrm{C})<(\mathrm{D})$
In case of (A) and (B), (B) contains more $-\mathrm{M}$ containing group then rate in (B) is lesser than (A)
Rate :- $(\mathrm{A})>(\mathrm{B})$
Overall Rate of alkyl halide substitution reaction is
$\text { (D) }>\text { (C) }>\text { (A) }>\text { (B) }$
JEE Main 2019
AMINES
278811
Assertion: Benzylamine is more basic than ethylamine Reason: Benzene shows + I effect.
1 If both Assertion and Reason are correct and the Reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason 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:
In case of benzylamine, benzene shows - I effect where as in ethylamine, ethyl group shows $+\mathrm{I}$ effect. $+\mathrm{I}$ effect increases basic strength increases. Hence, ethylamine is more basic than benzylamine.
