MCQ 11 Mark
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: Boiling point of amines are lower than those of alcohols and carboxylic acids.
Reason: Amines are much more soluble in water than less polar solvents like alcohol, ether, etc.
- A
Assertion and reason both are correct statements and reason is correct explanation for assertion.
- ✓
Assertion and reason both are correct statements but reason is not correct explanation for assertion.
- C
Assertion is correct statement but reason is wrong statement.
- D
Assertion is wrong statement but reason is correct statement.
AnswerCorrect option: B. Assertion and reason both are correct statements but reason is not correct explanation for assertion.
It is because hydrogen bonding is less pronounced in primary and secondary amines than that in alcohols or carboxylic acids and nitrogen is less electronegative than oxygen.
View full question & answer→MCQ 21 Mark
Note: In the following question a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
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.
- A
Both assertion and reason are wrong.
- B
Both assertion and reason are correct statements but reason is not correct explanation of assertion.
- ✓
Assertion is correct statement but reason is wrong statement.
- D
Both assertion and reason are correct statements and reason is correct explanation of assertion.
AnswerCorrect option: C. Assertion is correct statement but reason is wrong statement.
Amines on acetylation give monosubstituted product, while on alkylation gives polysubstitution product as well.
View full question & answer→MCQ 31 Mark
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: Aniline hydrogen sulphate, on heating, forms $p-$aminosulphonic acid.
Reason: The sulphonic acid group is electron$-$withdrawing.
- A
Assertion and reason both are correct statements and reason is correct explanation for assertion.
- ✓
Assertion and reason both are correct statements but reason is not correct explanation for assertion.
- C
Assertion is correct statement but reason is wrong statement.
- D
Assertion is wrong statement but reason is correct statement.
AnswerCorrect option: B. Assertion and reason both are correct statements but reason is not correct explanation for assertion.
$-NH_2$ being $o,p-$directing group directs $-SO_3H$ group to less hindered $p-$position.
View full question & answer→MCQ 41 Mark
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: Nitration of aniline can be done conveniently by protecting the amino group by acetylation.
Reason: Acetylation increases the electron density in the benzene ring.
- A
Assertion and reason both are correct statements and reason is correct explanation for assertion.
- B
Assertion and reason both are correct statements but reason is not correct explanation for assertion.
- ✓
Assertion is correct statement but reason is wrong statement.
- D
Assertion is wrong statement but reason is correct statement.
AnswerCorrect option: C. Assertion is correct statement but reason is wrong statement.
Acetylation decreases the electron density in the benzene ring and deactivate the ring hence control the reaction.
View full question & answer→MCQ 51 Mark
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: Ammonolysis of alkyl halides involves the reaction between alkyl halides and alcoholic ammonia.
Reason: Reaction can be used to prepare $1^\circ , 2^\circ , 3^\circ $ amines and finally quaternary ammonium salts.
- A
Assertion and reason both are correct statements and reason is correct explanation for assertion.
- ✓
Assertion and reason both are correct statements but reason is not correct explanation for assertion.
- C
Assertion is correct statement but reason is wrong statement.
- D
Assertion is wrong statement but reason is correct statement.
AnswerCorrect option: B. Assertion and reason both are correct statements but reason is not correct explanation for assertion.
View full question & answer→MCQ 61 Mark
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: Aniline is a weaker base than ethylamine.
Reason: Aniline is a weaker base than ethylamine.
- A
Assertion and reason both are correct statements and reason is correct explanation for assertion.
- ✓
Assertion and reason both are correct statements but reason is not correct explanation for assertion.
- C
Assertion is correct statement but reason is wrong statement.
- D
Assertion is wrong statement but reason is correct statement.
AnswerCorrect option: B. Assertion and reason both are correct statements but reason is not correct explanation for assertion.
The lone pair of electrons on the $N-$atom in aniline is delocalized over the benzene ring and is less easily available for protonation. Therefore, aniline is a weaker base than ethylamine.
View full question & answer→MCQ 71 Mark
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: In Hoffmann bromamide reaction, the amine formed has one carbon atom less than the parent $1^\circ $ amide.
Reason: $N-$methyl acetamide undergoes Hoffmann bromamide reaction.
- A
Assertion and reason both are correct statements and reason is correct explanation for assertion.
- B
Assertion and reason both are correct statements but reason is not correct explanation for assertion.
- ✓
Assertion is correct statement but reason is wrong statement.
- D
Assertion is wrong statement but reason is correct statement.
AnswerCorrect option: C. Assertion is correct statement but reason is wrong statement.
Only primary amines can be prepared from amides $\left(\mathrm{RCONH}_2\right)$ by treating with $\mathrm{Br}_2$ and $\text{KOH} .$ Thus$, N -$methyl acetamide i.e., $\mathrm{CH}_3 \mathrm{CONHCH}_3$ does not undergo Hoffmann bromamide reaction.
View full question & answer→MCQ 81 Mark
Note: In the following question a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: $N, N-$Diethylbenzene sulphonamide is insoluble in alkali.
Reason: Sulphonyl group attached to nitrogen atom is strong electron withdrawing group.
- A
Both assertion and reason are wrong.
- ✓
Both assertion and reason are correct statements but reason is not correct explanation of assertion.
- C
Assertion is correct statement but reason is wrong statement.
- D
Both assertion and reason are correct statements and reason is correct explanation of assertion.
AnswerCorrect option: B. Both assertion and reason are correct statements but reason is not correct explanation of assertion.
$N, N-$diethyl benzene sulphonamide is insoluble in alkali because it has no acidic hydrogen. Sulphonyl group attached to nitrogen atom is electron withdrawing group.
View full question & answer→MCQ 91 Mark
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: Ammonia is more basic than water.
Reason: Nitrogen is less electronegative than oxygen.
- ✓
Assertion and reason both are correct statements and reason is correct explanation for assertion.
- B
Assertion and reason both are correct statements but reason is not correct explanation for assertion.
- C
Assertion is correct statement but reason is wrong statement.
- D
Assertion is wrong statement but reason is correct statement.
AnswerCorrect option: A. Assertion and reason both are correct statements and reason is correct explanation for assertion.
Ammonia is more basic than water. It is because nitrogen being less electronegative than oxygen, has a greater tendency to donate electrons.
View full question & answer→MCQ 101 Mark
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: $\mathrm{Me}_3 \mathrm{N}$ reacts with $\mathrm{BF}_3$ whereas $\mathrm{Ph}_3 \mathrm{N}$ does not.
Reason: The electron pair on nitrogen atom in $\mathrm{Ph}_3 \mathrm{N}$ is delocalised in the benzene ring and is not available for boron in $\mathrm{BF}_3$.
- ✓
Assertion and reason both are correct statements and reason is correct explanation for assertion.
- B
Assertion and reason both are correct statements but reason is not correct explanation for assertion.
- C
Assertion is correct statement but reason is wrong statement.
- D
Assertion is wrong statement but reason is correct statement.
AnswerCorrect option: A. Assertion and reason both are correct statements and reason is correct explanation for assertion.
View full question & answer→MCQ 111 Mark
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: In order to convert $\text{R-CI}$ to pure $\mathrm{R-NH_2},$ Gabriel pthalimide synthesis can be used.
Reason: With proper choice ofalkyl halides, pthalimide synthesis can be used to prepare $1^\circ , 2^\circ $ or $3^\circ $ amines.
- A
Assertion and reason both are correct statements and reason is correct explanation for assertion.
- B
Assertion and reason both are correct statements but reason is not correct explanation for assertion.
- ✓
Assertion is correct statement but reason is wrong statement.
- D
Assertion is wrong statement but reason is correct statement.
AnswerCorrect option: C. Assertion is correct statement but reason is wrong statement.
Only primary aliphatic amines can be prepared by Gabriel phthalimide reaction.
View full question & answer→MCQ 121 Mark
Note: In the following question a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: $N-$Ethylbenzene sulphonamide is soluble in alkali.
Reason: Hydrogen attached to nitrogen in sulphonamide is strongly acidic.
- A
Both assertion and reason are wrong.
- B
Both assertion and reason are correct statements but reason is not correct explanation of assertion.
- C
Assertion is correct statement but reason is wrong statement.
- ✓
Both assertion and reason are correct statements and reason is correct explanation of assertion.
AnswerCorrect option: D. Both assertion and reason are correct statements and reason is correct explanation of assertion.
$\text{C}_2\text{H}_5-\text{N}-\text{SO}_2\text{C}_6\text{H}_5+\text{NaOH}\xrightarrow{\ \ \ \ }\text{C}_2\text{H}_5-\stackrel{{\ \ \ \text{Na}^+}}{\hbox{N}}-\text{SO}_2\text{C}_6\text{H}_5+\text{H}_2\text{O}\\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ |\\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{H}\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{Soluble salt}\\\ \ \ \ \ \ \ \text{Ethylbezene sulphonamide}$
Ethylbenzene sulphonomide is soluble in alkali because it has acidic hydrogen.
View full question & answer→MCQ 131 Mark
Note: In the following question a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: Aromatic $1^\circ $ amines can be prepared by Gabriel Phthalimide Synthesis.
Reason: Aryl halides undergo nucleophilic substitution with anion formed by phthalimide.
- ✓
Both assertion and reason are wrong.
- B
Both assertion and reason are correct statements but reason is not correct explanation of assertion.
- C
Assertion is correct statement but reason is wrong statement.
- D
Both assertion and reason are correct statements and reason is correct explanation of assertion.
AnswerCorrect option: A. Both assertion and reason are wrong.
Aromatic amines are never obtained by Gabriel phthalimide synthesis.
View full question & answer→MCQ 141 Mark
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: $p-$Anisidine is weaker base than aniline.
Reason: $\ce{OCH_3}$ group in anisidine exerts $+R$ effect.
- A
Assertion and reason both are correct statements and reason is correct explanation for assertion.
- B
Assertion and reason both are correct statements but reason is not correct explanation for assertion.
- C
Assertion is correct statement but reason is wrong statement.
- ✓
Assertion is wrong statement but reason is correct statement.
AnswerCorrect option: D. Assertion is wrong statement but reason is correct statement.
$p-$Anisidine is a stronger base than aniline$. -\ce{OCH_3}$ group in anisidine exerts $+R-$effect.
View full question & answer→MCQ 151 Mark
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: In strongly acidic solutions, aniline becomes more reactive towards electrophilic reagents. Reason: The amino group being completely protonated in strongly acidic solution, the lone pair of electrons on the nitrogen is no longer available for resonance.
- A
Assertion and reason both are correct statements and reason is correct explanation for assertion.
- B
Assertion and reason both are correct statements but reason is not correct explanation for assertion.
- C
Assertion is correct statement but reason is wrong statement.
- ✓
Assertion is wrong statement but reason is correct statement.
AnswerCorrect option: D. Assertion is wrong statement but reason is correct statement.
In strongly acidic medium, aniline gets protonated and so the lone pair of electrons is not available to produce $+E$ or $+ M$ effects. On the other hand, the $-\stackrel{+}{\hbox{N}}\text{H}_3$ group exerts strong $-I$ effect and thus it causes the deactivation of the ring.
View full question & answer→MCQ 161 Mark
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: Aniline is a weaker base than cyclohexylamine.
Reason: Aniline undergoes halogenation even in the absence of a catalyst.
- A
Assertion and reason both are correct statements and reason is correct explanation for assertion.
- ✓
Assertion and reason both are correct statements but reason is not correct explanation for assertion.
- C
Assertion is correct statement but reason is wrong statement.
- D
Assertion is wrong statement but reason is correct statement.
AnswerCorrect option: B. Assertion and reason both are correct statements but reason is not correct explanation for assertion.
Aniline exists as resonance hybrid. As a result of resonance, the lone pair of electrons on nitrogen gets delocalized over the benzene ring and thus, is less easily available for protonation than in case of cyclohexylamine where no such resonance takes place.
View full question & answer→MCQ 171 Mark
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: Aniline does not undergo Friedel$-$Crafts reaction.
Reason: $-NH_2$ group of aniline reacts with $\ce{AICl_3}.$
- ✓
Assertion and reason both are correct statements and reason is correct explanation for assertion.
- B
Assertion and reason both are correct statements but reason is not correct explanation for assertion.
- C
Assertion is correct statement but reason is wrong statement.
- D
Assertion is wrong statement but reason is correct statement.
AnswerCorrect option: A. Assertion and reason both are correct statements and reason is correct explanation for assertion.
View full question & answer→MCQ 181 Mark
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: Carbylamine reaction involves the reaction between $1^\circ $ amine and chloroform in basic medium.
Reason: In carbylamine reaction$, -NH_2$ group is converted into $- NC$ group.
- ✓
Assertion and reason both are correct statements and reason is correct explanation for assertion.
- B
Assertion and reason both are correct statements but reason is not correct explanation for assertion.
- C
Assertion is correct statement but reason is wrong statement.
- D
Assertion is wrong statement but reason is correct statement.
AnswerCorrect option: A. Assertion and reason both are correct statements and reason is correct explanation for assertion.
$\text{RNH}_2+\text{CHIl}_3+3\text{KOH}(\text{alc})\rightarrow\\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{R}-\text{N}\equiv\text{C}+3\text{KCl}+3\text{H}_2\text{O}$
View full question & answer→MCQ 191 Mark
Note: In the following question a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: Hoffmann’s bromamide reaction is given by primary amines.
Reason: Primary amines are more basic than secondary amines.
- ✓
Both assertion and reason are wrong.
- B
Both assertion and reason are correct statements but reason is not correct explanation of assertion.
- C
Assertion is correct statement but reason is wrong statement.
- D
Both assertion and reason are correct statements and reason is correct explanation of assertion.
AnswerCorrect option: A. Both assertion and reason are wrong.
Hofmann’s bromamide reaction is given by amides, not by amines. Moreover, primary amines are basic than secondary amines.
View full question & answer→MCQ 201 Mark
Note: In the following question a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: Acetanilide is less basic than aniline.
Reason: Acetylation of aniline results in decrease of electron density on nitrogen.
- A
Both assertion and reason are wrong.
- B
Both assertion and reason are correct statements but reason is not correct explanation of assertion.
- C
Assertion is correct statement but reason is wrong statement.
- ✓
Both assertion and reason are correct statements and reason is correct explanation of assertion.
AnswerCorrect option: D. Both assertion and reason are correct statements and reason is correct explanation of assertion.
Acetanilide is less basic than aniline because electron density of nitrogen is lowered by acetyl group.
View full question & answer→MCQ 211 Mark
Note: In the following question a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: Only a small amount of $\text{HCl}$ is required in the reduction of nitro compounds with iron scrap and $\text{HCl}$ in the presence of steam.
Reason: $\ce{FeCl_2}$ formed gets hydrolysed to release $\text{HCl}$ during the reaction.
- A
Both assertion and reason are wrong.
- B
Both assertion and reason are correct statements but reason is not correct explanation of assertion.
- C
Assertion is correct statement but reason is wrong statement.
- ✓
Both assertion and reason are correct statements and reason is correct explanation of assertion.
AnswerCorrect option: D. Both assertion and reason are correct statements and reason is correct explanation of assertion.
$\mathrm{Fe}+2 \mathrm{HCl} \rightarrow \mathrm{FeCl}_2+2[\mathrm{H}]$
Nascent hydrogen reduces nitro compounds.
$\mathrm{FeCl}_2+\mathrm{H}_2 \mathrm{O}(\mathrm{~g}) \rightarrow \mathrm{FeO}+2 \mathrm{HCl}$
View full question & answer→MCQ 221 Mark
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: In ammonolysis, the order of reactivity of halides with amines is $\text{R-1 < R-Br > R-CI.}$
Reason: Ammonolysis is a nucleophilic substitution reaction.
- A
Assertion and reason both are correct statements and reason is correct explanation for assertion.
- ✓
Assertion and reason both are correct statements but reason is not correct explanation for assertion.
- C
Assertion is correct statement but reason is wrong statement.
- D
Assertion is wrong statement but reason is correct statement.
AnswerCorrect option: B. Assertion and reason both are correct statements but reason is not correct explanation for assertion.
View full question & answer→MCQ 231 Mark
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: Controlled nitration of aniline at low temperature mainly gives $m-$nitroaniline.
Reason: In acidic medium$, -NH_2$ group gets converted into $m-$directing group.
- ✓
Assertion and reason both are correct statements and reason is correct explanation for assertion.
- B
Assertion and reason both are correct statements but reason is not correct explanation for assertion.
- C
Assertion is correct statement but reason is wrong statement.
- D
Assertion is wrong statement but reason is correct statement.
AnswerCorrect option: A. Assertion and reason both are correct statements and reason is correct explanation for assertion.
Under acidic condition, aniline gets protonated to anilinium ion $(\text{NH}^+_3$ group$)$ This is deactivating and $m-$directing group. Thus, controlled nitration of aniline mainly gives $m-$nitroaniline.
View full question & answer→MCQ 241 Mark
In these questions, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
Assertion: Ortho substituted anilines are usually weaker bases than anilines.
Reason: This is due to ortho effect.
- ✓
Assertion and reason both are correct statements and reason is correct explanation for assertion.
- B
Assertion and reason both are correct statements but reason is not correct explanation for assertion.
- C
Assertion is correct statement but reason is wrong statement.
- D
Assertion is wrong statement but reason is correct statement.
AnswerCorrect option: A. Assertion and reason both are correct statements and reason is correct explanation for assertion.
Ortho effect is a consequence of steric and electronic factors.
View full question & answer→