NEET Test Series from KOTA - 10 Papers In MS WORD
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GENERAL ORGANIC CHEMISTRY
231684
In the reaction \(\mathrm{CH}_3 \mathrm{NH}_2+\mathrm{CHCl}_3+\mathrm{KOH} \rightarrow[\mathrm{X}]+\mathrm{KCl}+\mathrm{H}_2 \mathrm{O}\) the compound \((X)\) is
: \(\mathrm{CH}_3 \mathrm{NH}_2+\mathrm{CHCl}_3+\mathrm{KOH} \rightarrow[\mathrm{X}]+\mathrm{KCl}+\mathrm{H}_2 \mathrm{O}\) The nitrogen containing compound is foul smelling methyl isocyanides \(\mathrm{H}_3 \mathrm{CN} \equiv \mathrm{C}\) It is an example of isocyanides test. It is used for the detection of primary amines. The balanced chemical reaction would be - \(\mathrm{CHCl}_3+3 \mathrm{KOH} \rightarrow \mathrm{CH}_3 \mathrm{~N} \equiv \mathrm{C}+3 \mathrm{KCl}+3 \mathrm{H}_2 \mathrm{O}\)
CG PET -2018
GENERAL ORGANIC CHEMISTRY
231687
The increasing order of reactivity of the following compounds towards aromatic electrophilic substitution reaction is:
1 A \(<\) B \(<\) C \(<\) D
2 B $<$ C $<$ A $<$ D
3 D $<$ A $<$ C $<$ B
4 D $<$ B $<$ A $<$ C
Explanation:
The increasing order of reactivity of the given compounds towards aromatic electrophilic substitution reaction can be demonstrated by following diagram - Hence, the correct order is - $\mathrm{D}<$ A $<$ C $<$ B
JEE Main-2019
GENERAL ORGANIC CHEMISTRY
231688
The correct order of the following compounds showing increasing tendency nucleophilic substitution reaction is
1 (iv) $<$ (iii) $<$ (ii) $<$ (i)
2 (iv) $<$ (i) $<$ (ii) $<$ (iii)
3 (iv) $<$ (i) $<$ (iii) $<$ (ii)
4 (i) $<$ (ii) $<$ (iii) $<$ (iv)
Explanation:
(D) : The correct order of reactivity towards nucleophilic substitution reaction is $\mathrm{i}<\mathrm{ii}<\mathrm{iii}<\mathrm{iv}$.
JEE Main 2021
GENERAL ORGANIC CHEMISTRY
231689
Choose the correct statement regarding the formation of carbocations $A$ and $B$
1 Carbocation \(B\) is more stable and formed relatively at faster rate.
2 Carbocation \(\mathrm{A}\) is more stable and formed relatively at slow rate
3 Carbocation \(\mathrm{B}\) is more stable and formed relatively at slow rate
4 Carbocation \(\mathrm{A}\) is more stable and formed relatively at faster rate
Explanation:
Exp : (A) : Since, we know that stability of carbocation is \(3^{\circ}>2^{\circ}>\) \(1^{\circ}\) As the number of \(+\mathrm{I}\) group increases, then the stability of carbocation also get increased. Hence, carbocation B is more stable and formed relatively at rate faster.
231684
In the reaction \(\mathrm{CH}_3 \mathrm{NH}_2+\mathrm{CHCl}_3+\mathrm{KOH} \rightarrow[\mathrm{X}]+\mathrm{KCl}+\mathrm{H}_2 \mathrm{O}\) the compound \((X)\) is
: \(\mathrm{CH}_3 \mathrm{NH}_2+\mathrm{CHCl}_3+\mathrm{KOH} \rightarrow[\mathrm{X}]+\mathrm{KCl}+\mathrm{H}_2 \mathrm{O}\) The nitrogen containing compound is foul smelling methyl isocyanides \(\mathrm{H}_3 \mathrm{CN} \equiv \mathrm{C}\) It is an example of isocyanides test. It is used for the detection of primary amines. The balanced chemical reaction would be - \(\mathrm{CHCl}_3+3 \mathrm{KOH} \rightarrow \mathrm{CH}_3 \mathrm{~N} \equiv \mathrm{C}+3 \mathrm{KCl}+3 \mathrm{H}_2 \mathrm{O}\)
CG PET -2018
GENERAL ORGANIC CHEMISTRY
231687
The increasing order of reactivity of the following compounds towards aromatic electrophilic substitution reaction is:
1 A \(<\) B \(<\) C \(<\) D
2 B $<$ C $<$ A $<$ D
3 D $<$ A $<$ C $<$ B
4 D $<$ B $<$ A $<$ C
Explanation:
The increasing order of reactivity of the given compounds towards aromatic electrophilic substitution reaction can be demonstrated by following diagram - Hence, the correct order is - $\mathrm{D}<$ A $<$ C $<$ B
JEE Main-2019
GENERAL ORGANIC CHEMISTRY
231688
The correct order of the following compounds showing increasing tendency nucleophilic substitution reaction is
1 (iv) $<$ (iii) $<$ (ii) $<$ (i)
2 (iv) $<$ (i) $<$ (ii) $<$ (iii)
3 (iv) $<$ (i) $<$ (iii) $<$ (ii)
4 (i) $<$ (ii) $<$ (iii) $<$ (iv)
Explanation:
(D) : The correct order of reactivity towards nucleophilic substitution reaction is $\mathrm{i}<\mathrm{ii}<\mathrm{iii}<\mathrm{iv}$.
JEE Main 2021
GENERAL ORGANIC CHEMISTRY
231689
Choose the correct statement regarding the formation of carbocations $A$ and $B$
1 Carbocation \(B\) is more stable and formed relatively at faster rate.
2 Carbocation \(\mathrm{A}\) is more stable and formed relatively at slow rate
3 Carbocation \(\mathrm{B}\) is more stable and formed relatively at slow rate
4 Carbocation \(\mathrm{A}\) is more stable and formed relatively at faster rate
Explanation:
Exp : (A) : Since, we know that stability of carbocation is \(3^{\circ}>2^{\circ}>\) \(1^{\circ}\) As the number of \(+\mathrm{I}\) group increases, then the stability of carbocation also get increased. Hence, carbocation B is more stable and formed relatively at rate faster.
231684
In the reaction \(\mathrm{CH}_3 \mathrm{NH}_2+\mathrm{CHCl}_3+\mathrm{KOH} \rightarrow[\mathrm{X}]+\mathrm{KCl}+\mathrm{H}_2 \mathrm{O}\) the compound \((X)\) is
: \(\mathrm{CH}_3 \mathrm{NH}_2+\mathrm{CHCl}_3+\mathrm{KOH} \rightarrow[\mathrm{X}]+\mathrm{KCl}+\mathrm{H}_2 \mathrm{O}\) The nitrogen containing compound is foul smelling methyl isocyanides \(\mathrm{H}_3 \mathrm{CN} \equiv \mathrm{C}\) It is an example of isocyanides test. It is used for the detection of primary amines. The balanced chemical reaction would be - \(\mathrm{CHCl}_3+3 \mathrm{KOH} \rightarrow \mathrm{CH}_3 \mathrm{~N} \equiv \mathrm{C}+3 \mathrm{KCl}+3 \mathrm{H}_2 \mathrm{O}\)
CG PET -2018
GENERAL ORGANIC CHEMISTRY
231687
The increasing order of reactivity of the following compounds towards aromatic electrophilic substitution reaction is:
1 A \(<\) B \(<\) C \(<\) D
2 B $<$ C $<$ A $<$ D
3 D $<$ A $<$ C $<$ B
4 D $<$ B $<$ A $<$ C
Explanation:
The increasing order of reactivity of the given compounds towards aromatic electrophilic substitution reaction can be demonstrated by following diagram - Hence, the correct order is - $\mathrm{D}<$ A $<$ C $<$ B
JEE Main-2019
GENERAL ORGANIC CHEMISTRY
231688
The correct order of the following compounds showing increasing tendency nucleophilic substitution reaction is
1 (iv) $<$ (iii) $<$ (ii) $<$ (i)
2 (iv) $<$ (i) $<$ (ii) $<$ (iii)
3 (iv) $<$ (i) $<$ (iii) $<$ (ii)
4 (i) $<$ (ii) $<$ (iii) $<$ (iv)
Explanation:
(D) : The correct order of reactivity towards nucleophilic substitution reaction is $\mathrm{i}<\mathrm{ii}<\mathrm{iii}<\mathrm{iv}$.
JEE Main 2021
GENERAL ORGANIC CHEMISTRY
231689
Choose the correct statement regarding the formation of carbocations $A$ and $B$
1 Carbocation \(B\) is more stable and formed relatively at faster rate.
2 Carbocation \(\mathrm{A}\) is more stable and formed relatively at slow rate
3 Carbocation \(\mathrm{B}\) is more stable and formed relatively at slow rate
4 Carbocation \(\mathrm{A}\) is more stable and formed relatively at faster rate
Explanation:
Exp : (A) : Since, we know that stability of carbocation is \(3^{\circ}>2^{\circ}>\) \(1^{\circ}\) As the number of \(+\mathrm{I}\) group increases, then the stability of carbocation also get increased. Hence, carbocation B is more stable and formed relatively at rate faster.
231684
In the reaction \(\mathrm{CH}_3 \mathrm{NH}_2+\mathrm{CHCl}_3+\mathrm{KOH} \rightarrow[\mathrm{X}]+\mathrm{KCl}+\mathrm{H}_2 \mathrm{O}\) the compound \((X)\) is
: \(\mathrm{CH}_3 \mathrm{NH}_2+\mathrm{CHCl}_3+\mathrm{KOH} \rightarrow[\mathrm{X}]+\mathrm{KCl}+\mathrm{H}_2 \mathrm{O}\) The nitrogen containing compound is foul smelling methyl isocyanides \(\mathrm{H}_3 \mathrm{CN} \equiv \mathrm{C}\) It is an example of isocyanides test. It is used for the detection of primary amines. The balanced chemical reaction would be - \(\mathrm{CHCl}_3+3 \mathrm{KOH} \rightarrow \mathrm{CH}_3 \mathrm{~N} \equiv \mathrm{C}+3 \mathrm{KCl}+3 \mathrm{H}_2 \mathrm{O}\)
CG PET -2018
GENERAL ORGANIC CHEMISTRY
231687
The increasing order of reactivity of the following compounds towards aromatic electrophilic substitution reaction is:
1 A \(<\) B \(<\) C \(<\) D
2 B $<$ C $<$ A $<$ D
3 D $<$ A $<$ C $<$ B
4 D $<$ B $<$ A $<$ C
Explanation:
The increasing order of reactivity of the given compounds towards aromatic electrophilic substitution reaction can be demonstrated by following diagram - Hence, the correct order is - $\mathrm{D}<$ A $<$ C $<$ B
JEE Main-2019
GENERAL ORGANIC CHEMISTRY
231688
The correct order of the following compounds showing increasing tendency nucleophilic substitution reaction is
1 (iv) $<$ (iii) $<$ (ii) $<$ (i)
2 (iv) $<$ (i) $<$ (ii) $<$ (iii)
3 (iv) $<$ (i) $<$ (iii) $<$ (ii)
4 (i) $<$ (ii) $<$ (iii) $<$ (iv)
Explanation:
(D) : The correct order of reactivity towards nucleophilic substitution reaction is $\mathrm{i}<\mathrm{ii}<\mathrm{iii}<\mathrm{iv}$.
JEE Main 2021
GENERAL ORGANIC CHEMISTRY
231689
Choose the correct statement regarding the formation of carbocations $A$ and $B$
1 Carbocation \(B\) is more stable and formed relatively at faster rate.
2 Carbocation \(\mathrm{A}\) is more stable and formed relatively at slow rate
3 Carbocation \(\mathrm{B}\) is more stable and formed relatively at slow rate
4 Carbocation \(\mathrm{A}\) is more stable and formed relatively at faster rate
Explanation:
Exp : (A) : Since, we know that stability of carbocation is \(3^{\circ}>2^{\circ}>\) \(1^{\circ}\) As the number of \(+\mathrm{I}\) group increases, then the stability of carbocation also get increased. Hence, carbocation B is more stable and formed relatively at rate faster.
