91096
Treatment of gives with \(\mathrm{NaNH}_2\) /liq. \(\mathrm{NH}_3\) gives
1
2
3
4
Explanation:
Benzene (eliminations addition)
**[WB-JEE-2013]**
HALOALKANES AND HALOARENES
91075
$\mathrm{C}-\mathrm{Cl}$ bond in chlorobenzene a comparison to $\mathrm{C}-\mathrm{Cl}$ bond in methyl chloride is
1 longer and weaker
2 shorter and weaker
3 shorter and stronger
4 longer and stronger
Explanation:
Because of $+\mathrm{R}$ effect of $\mathrm{Cl}$-atom with the ring, $\mathrm{C}-\mathrm{Cl}$ bond in chlorobenzene gets a double bond character and it becomes shorter and stronger than the $\mathrm{C}-\mathrm{Cl}$ bond of in methyl chloride $\left(\mathrm{CH}_{3}-\mathrm{Cl}\right)$, which does have such effect.
Shift-I]**
HALOALKANES AND HALOARENES
91082
A compound that undergoes bromination easily is
1 toluene
2 benzoic acid
3 phenol
4 benzene. EXTRAA
Explanation:
$\mathrm{CH}_{3}, \mathrm{OH}$ group is the activating group which activate the benzene ring through own high power of $+\mathrm{I}$ and $+\mathrm{R}$ respectively. Benzoic acid has the $-\mathrm{COOH}$ group which is a benzene deactivating group and supress the speed of reaction. Benzene has no any group i.e. activating group/deactivating group. Hence, bromine readily react with phenol.
**[COMEDK 2018]**
HALOALKANES AND HALOARENES
91097
An equimolar mixture of toluene and chlorobenzene is treated with a mixture of conc. $\mathrm{H}_{2} \mathrm{SO}_{4}$ and conc, $\mathrm{HNO}_{3}$. Indicate the correct statement from the following.
1 p-nitrotoluene is formed in excess
2 equimolar amounts of p-nitrotoluene and $p$-nitrochlorobenzene are formed
3 p-nitrochlorobenzene is formed in excess
4 m-nitrochlorobenzene is formed in excess
Explanation:
Toluene undergoes nitration to give ortho and para nitrotoluene isomers, but if heated it can give dinitrotoluene and ultimately the explosive trinitrotoluene.
**[WB-JEE-2012]**
HALOALKANES AND HALOARENES
91085
Which one of the following is an allylic halide?
1 2-chlorobutane
2 Chloroethene
3 3-bromopropene
4 2-chlorotoluene
5 Dichloromethane
Explanation:
In allylic halides, halogen atom is linked to a $\mathrm{sp}^{3}$-hybridised carbon atom which is next to carbon bond. $\mathrm{CH}_{3}=\mathrm{CH}-\mathrm{CH}_{2} \mathrm{Br}$ (3-bromopropene) is an allylic halide.
91096
Treatment of gives with \(\mathrm{NaNH}_2\) /liq. \(\mathrm{NH}_3\) gives
1
2
3
4
Explanation:
Benzene (eliminations addition)
**[WB-JEE-2013]**
HALOALKANES AND HALOARENES
91075
$\mathrm{C}-\mathrm{Cl}$ bond in chlorobenzene a comparison to $\mathrm{C}-\mathrm{Cl}$ bond in methyl chloride is
1 longer and weaker
2 shorter and weaker
3 shorter and stronger
4 longer and stronger
Explanation:
Because of $+\mathrm{R}$ effect of $\mathrm{Cl}$-atom with the ring, $\mathrm{C}-\mathrm{Cl}$ bond in chlorobenzene gets a double bond character and it becomes shorter and stronger than the $\mathrm{C}-\mathrm{Cl}$ bond of in methyl chloride $\left(\mathrm{CH}_{3}-\mathrm{Cl}\right)$, which does have such effect.
Shift-I]**
HALOALKANES AND HALOARENES
91082
A compound that undergoes bromination easily is
1 toluene
2 benzoic acid
3 phenol
4 benzene. EXTRAA
Explanation:
$\mathrm{CH}_{3}, \mathrm{OH}$ group is the activating group which activate the benzene ring through own high power of $+\mathrm{I}$ and $+\mathrm{R}$ respectively. Benzoic acid has the $-\mathrm{COOH}$ group which is a benzene deactivating group and supress the speed of reaction. Benzene has no any group i.e. activating group/deactivating group. Hence, bromine readily react with phenol.
**[COMEDK 2018]**
HALOALKANES AND HALOARENES
91097
An equimolar mixture of toluene and chlorobenzene is treated with a mixture of conc. $\mathrm{H}_{2} \mathrm{SO}_{4}$ and conc, $\mathrm{HNO}_{3}$. Indicate the correct statement from the following.
1 p-nitrotoluene is formed in excess
2 equimolar amounts of p-nitrotoluene and $p$-nitrochlorobenzene are formed
3 p-nitrochlorobenzene is formed in excess
4 m-nitrochlorobenzene is formed in excess
Explanation:
Toluene undergoes nitration to give ortho and para nitrotoluene isomers, but if heated it can give dinitrotoluene and ultimately the explosive trinitrotoluene.
**[WB-JEE-2012]**
HALOALKANES AND HALOARENES
91085
Which one of the following is an allylic halide?
1 2-chlorobutane
2 Chloroethene
3 3-bromopropene
4 2-chlorotoluene
5 Dichloromethane
Explanation:
In allylic halides, halogen atom is linked to a $\mathrm{sp}^{3}$-hybridised carbon atom which is next to carbon bond. $\mathrm{CH}_{3}=\mathrm{CH}-\mathrm{CH}_{2} \mathrm{Br}$ (3-bromopropene) is an allylic halide.
NEET Test Series from KOTA - 10 Papers In MS WORD
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HALOALKANES AND HALOARENES
91096
Treatment of gives with \(\mathrm{NaNH}_2\) /liq. \(\mathrm{NH}_3\) gives
1
2
3
4
Explanation:
Benzene (eliminations addition)
**[WB-JEE-2013]**
HALOALKANES AND HALOARENES
91075
$\mathrm{C}-\mathrm{Cl}$ bond in chlorobenzene a comparison to $\mathrm{C}-\mathrm{Cl}$ bond in methyl chloride is
1 longer and weaker
2 shorter and weaker
3 shorter and stronger
4 longer and stronger
Explanation:
Because of $+\mathrm{R}$ effect of $\mathrm{Cl}$-atom with the ring, $\mathrm{C}-\mathrm{Cl}$ bond in chlorobenzene gets a double bond character and it becomes shorter and stronger than the $\mathrm{C}-\mathrm{Cl}$ bond of in methyl chloride $\left(\mathrm{CH}_{3}-\mathrm{Cl}\right)$, which does have such effect.
Shift-I]**
HALOALKANES AND HALOARENES
91082
A compound that undergoes bromination easily is
1 toluene
2 benzoic acid
3 phenol
4 benzene. EXTRAA
Explanation:
$\mathrm{CH}_{3}, \mathrm{OH}$ group is the activating group which activate the benzene ring through own high power of $+\mathrm{I}$ and $+\mathrm{R}$ respectively. Benzoic acid has the $-\mathrm{COOH}$ group which is a benzene deactivating group and supress the speed of reaction. Benzene has no any group i.e. activating group/deactivating group. Hence, bromine readily react with phenol.
**[COMEDK 2018]**
HALOALKANES AND HALOARENES
91097
An equimolar mixture of toluene and chlorobenzene is treated with a mixture of conc. $\mathrm{H}_{2} \mathrm{SO}_{4}$ and conc, $\mathrm{HNO}_{3}$. Indicate the correct statement from the following.
1 p-nitrotoluene is formed in excess
2 equimolar amounts of p-nitrotoluene and $p$-nitrochlorobenzene are formed
3 p-nitrochlorobenzene is formed in excess
4 m-nitrochlorobenzene is formed in excess
Explanation:
Toluene undergoes nitration to give ortho and para nitrotoluene isomers, but if heated it can give dinitrotoluene and ultimately the explosive trinitrotoluene.
**[WB-JEE-2012]**
HALOALKANES AND HALOARENES
91085
Which one of the following is an allylic halide?
1 2-chlorobutane
2 Chloroethene
3 3-bromopropene
4 2-chlorotoluene
5 Dichloromethane
Explanation:
In allylic halides, halogen atom is linked to a $\mathrm{sp}^{3}$-hybridised carbon atom which is next to carbon bond. $\mathrm{CH}_{3}=\mathrm{CH}-\mathrm{CH}_{2} \mathrm{Br}$ (3-bromopropene) is an allylic halide.
91096
Treatment of gives with \(\mathrm{NaNH}_2\) /liq. \(\mathrm{NH}_3\) gives
1
2
3
4
Explanation:
Benzene (eliminations addition)
**[WB-JEE-2013]**
HALOALKANES AND HALOARENES
91075
$\mathrm{C}-\mathrm{Cl}$ bond in chlorobenzene a comparison to $\mathrm{C}-\mathrm{Cl}$ bond in methyl chloride is
1 longer and weaker
2 shorter and weaker
3 shorter and stronger
4 longer and stronger
Explanation:
Because of $+\mathrm{R}$ effect of $\mathrm{Cl}$-atom with the ring, $\mathrm{C}-\mathrm{Cl}$ bond in chlorobenzene gets a double bond character and it becomes shorter and stronger than the $\mathrm{C}-\mathrm{Cl}$ bond of in methyl chloride $\left(\mathrm{CH}_{3}-\mathrm{Cl}\right)$, which does have such effect.
Shift-I]**
HALOALKANES AND HALOARENES
91082
A compound that undergoes bromination easily is
1 toluene
2 benzoic acid
3 phenol
4 benzene. EXTRAA
Explanation:
$\mathrm{CH}_{3}, \mathrm{OH}$ group is the activating group which activate the benzene ring through own high power of $+\mathrm{I}$ and $+\mathrm{R}$ respectively. Benzoic acid has the $-\mathrm{COOH}$ group which is a benzene deactivating group and supress the speed of reaction. Benzene has no any group i.e. activating group/deactivating group. Hence, bromine readily react with phenol.
**[COMEDK 2018]**
HALOALKANES AND HALOARENES
91097
An equimolar mixture of toluene and chlorobenzene is treated with a mixture of conc. $\mathrm{H}_{2} \mathrm{SO}_{4}$ and conc, $\mathrm{HNO}_{3}$. Indicate the correct statement from the following.
1 p-nitrotoluene is formed in excess
2 equimolar amounts of p-nitrotoluene and $p$-nitrochlorobenzene are formed
3 p-nitrochlorobenzene is formed in excess
4 m-nitrochlorobenzene is formed in excess
Explanation:
Toluene undergoes nitration to give ortho and para nitrotoluene isomers, but if heated it can give dinitrotoluene and ultimately the explosive trinitrotoluene.
**[WB-JEE-2012]**
HALOALKANES AND HALOARENES
91085
Which one of the following is an allylic halide?
1 2-chlorobutane
2 Chloroethene
3 3-bromopropene
4 2-chlorotoluene
5 Dichloromethane
Explanation:
In allylic halides, halogen atom is linked to a $\mathrm{sp}^{3}$-hybridised carbon atom which is next to carbon bond. $\mathrm{CH}_{3}=\mathrm{CH}-\mathrm{CH}_{2} \mathrm{Br}$ (3-bromopropene) is an allylic halide.
91096
Treatment of gives with \(\mathrm{NaNH}_2\) /liq. \(\mathrm{NH}_3\) gives
1
2
3
4
Explanation:
Benzene (eliminations addition)
**[WB-JEE-2013]**
HALOALKANES AND HALOARENES
91075
$\mathrm{C}-\mathrm{Cl}$ bond in chlorobenzene a comparison to $\mathrm{C}-\mathrm{Cl}$ bond in methyl chloride is
1 longer and weaker
2 shorter and weaker
3 shorter and stronger
4 longer and stronger
Explanation:
Because of $+\mathrm{R}$ effect of $\mathrm{Cl}$-atom with the ring, $\mathrm{C}-\mathrm{Cl}$ bond in chlorobenzene gets a double bond character and it becomes shorter and stronger than the $\mathrm{C}-\mathrm{Cl}$ bond of in methyl chloride $\left(\mathrm{CH}_{3}-\mathrm{Cl}\right)$, which does have such effect.
Shift-I]**
HALOALKANES AND HALOARENES
91082
A compound that undergoes bromination easily is
1 toluene
2 benzoic acid
3 phenol
4 benzene. EXTRAA
Explanation:
$\mathrm{CH}_{3}, \mathrm{OH}$ group is the activating group which activate the benzene ring through own high power of $+\mathrm{I}$ and $+\mathrm{R}$ respectively. Benzoic acid has the $-\mathrm{COOH}$ group which is a benzene deactivating group and supress the speed of reaction. Benzene has no any group i.e. activating group/deactivating group. Hence, bromine readily react with phenol.
**[COMEDK 2018]**
HALOALKANES AND HALOARENES
91097
An equimolar mixture of toluene and chlorobenzene is treated with a mixture of conc. $\mathrm{H}_{2} \mathrm{SO}_{4}$ and conc, $\mathrm{HNO}_{3}$. Indicate the correct statement from the following.
1 p-nitrotoluene is formed in excess
2 equimolar amounts of p-nitrotoluene and $p$-nitrochlorobenzene are formed
3 p-nitrochlorobenzene is formed in excess
4 m-nitrochlorobenzene is formed in excess
Explanation:
Toluene undergoes nitration to give ortho and para nitrotoluene isomers, but if heated it can give dinitrotoluene and ultimately the explosive trinitrotoluene.
**[WB-JEE-2012]**
HALOALKANES AND HALOARENES
91085
Which one of the following is an allylic halide?
1 2-chlorobutane
2 Chloroethene
3 3-bromopropene
4 2-chlorotoluene
5 Dichloromethane
Explanation:
In allylic halides, halogen atom is linked to a $\mathrm{sp}^{3}$-hybridised carbon atom which is next to carbon bond. $\mathrm{CH}_{3}=\mathrm{CH}-\mathrm{CH}_{2} \mathrm{Br}$ (3-bromopropene) is an allylic halide.
with \(\mathrm{NaNH}_2\) /liq. \(\mathrm{NH}_3\) gives
