91102
1-methyl ethylene oxide when treated with an excess of $\mathrm{HBr}$ produces :
1
2
3
4
Explanation:
**[JEE MAINS 2020
HALOALKANES AND HALOARENES
91105
The hydrolysis reaction that takes place at the slowest rate, among the following is
1
2
3
4
Explanation:
Aryl halides don't show NSR easily at room temperature.
**[Odisha NEET 2019]**
HALOALKANES AND HALOARENES
91106
Neopentyl bromide, undergoes dehydrohalogenation to give alkenes even though it has no hydrogen. This is due to
1 E2 mechanism
2 E1 mechanism
3 Rearrangement of carbocations by E1 mechanism
4 $\mathrm{E} 1 \mathrm{cB}$ mechanism
5 E1 mechanism
Explanation:
Neopentyl bromide $\left(\mathrm{C}_{5} \mathrm{H}_{11} \mathrm{Br}\right)$ give a carbocation as intermediate which undergo for rearrangement and show $\mathrm{E}_{1}$ mechanism (Even has no $\beta$ $\mathrm{H}$ atom).
**[Kerala CEE-2018]**
HALOALKANES AND HALOARENES
91107
The compound which does not lead to nitrile by substitution with $\mathrm{NaCN} / \mathrm{DMSO}$ is
1 benzyl chloride
2 ethyl chloride
3 isopropyl chloride
4 chlorobenzene
5 isobutyl chloride
Explanation:
In chlorobenzene, the lone pairs of electron on the chlorine atom are delocalized on the benzene ring $\mathrm{As}$ a result $\mathrm{C}-\mathrm{Cl}$ acquires some double bond character, hence difficult to break or substitute.
91102
1-methyl ethylene oxide when treated with an excess of $\mathrm{HBr}$ produces :
1
2
3
4
Explanation:
**[JEE MAINS 2020
HALOALKANES AND HALOARENES
91105
The hydrolysis reaction that takes place at the slowest rate, among the following is
1
2
3
4
Explanation:
Aryl halides don't show NSR easily at room temperature.
**[Odisha NEET 2019]**
HALOALKANES AND HALOARENES
91106
Neopentyl bromide, undergoes dehydrohalogenation to give alkenes even though it has no hydrogen. This is due to
1 E2 mechanism
2 E1 mechanism
3 Rearrangement of carbocations by E1 mechanism
4 $\mathrm{E} 1 \mathrm{cB}$ mechanism
5 E1 mechanism
Explanation:
Neopentyl bromide $\left(\mathrm{C}_{5} \mathrm{H}_{11} \mathrm{Br}\right)$ give a carbocation as intermediate which undergo for rearrangement and show $\mathrm{E}_{1}$ mechanism (Even has no $\beta$ $\mathrm{H}$ atom).
**[Kerala CEE-2018]**
HALOALKANES AND HALOARENES
91107
The compound which does not lead to nitrile by substitution with $\mathrm{NaCN} / \mathrm{DMSO}$ is
1 benzyl chloride
2 ethyl chloride
3 isopropyl chloride
4 chlorobenzene
5 isobutyl chloride
Explanation:
In chlorobenzene, the lone pairs of electron on the chlorine atom are delocalized on the benzene ring $\mathrm{As}$ a result $\mathrm{C}-\mathrm{Cl}$ acquires some double bond character, hence difficult to break or substitute.
91102
1-methyl ethylene oxide when treated with an excess of $\mathrm{HBr}$ produces :
1
2
3
4
Explanation:
**[JEE MAINS 2020
HALOALKANES AND HALOARENES
91105
The hydrolysis reaction that takes place at the slowest rate, among the following is
1
2
3
4
Explanation:
Aryl halides don't show NSR easily at room temperature.
**[Odisha NEET 2019]**
HALOALKANES AND HALOARENES
91106
Neopentyl bromide, undergoes dehydrohalogenation to give alkenes even though it has no hydrogen. This is due to
1 E2 mechanism
2 E1 mechanism
3 Rearrangement of carbocations by E1 mechanism
4 $\mathrm{E} 1 \mathrm{cB}$ mechanism
5 E1 mechanism
Explanation:
Neopentyl bromide $\left(\mathrm{C}_{5} \mathrm{H}_{11} \mathrm{Br}\right)$ give a carbocation as intermediate which undergo for rearrangement and show $\mathrm{E}_{1}$ mechanism (Even has no $\beta$ $\mathrm{H}$ atom).
**[Kerala CEE-2018]**
HALOALKANES AND HALOARENES
91107
The compound which does not lead to nitrile by substitution with $\mathrm{NaCN} / \mathrm{DMSO}$ is
1 benzyl chloride
2 ethyl chloride
3 isopropyl chloride
4 chlorobenzene
5 isobutyl chloride
Explanation:
In chlorobenzene, the lone pairs of electron on the chlorine atom are delocalized on the benzene ring $\mathrm{As}$ a result $\mathrm{C}-\mathrm{Cl}$ acquires some double bond character, hence difficult to break or substitute.
NEET Test Series from KOTA - 10 Papers In MS WORD
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HALOALKANES AND HALOARENES
91102
1-methyl ethylene oxide when treated with an excess of $\mathrm{HBr}$ produces :
1
2
3
4
Explanation:
**[JEE MAINS 2020
HALOALKANES AND HALOARENES
91105
The hydrolysis reaction that takes place at the slowest rate, among the following is
1
2
3
4
Explanation:
Aryl halides don't show NSR easily at room temperature.
**[Odisha NEET 2019]**
HALOALKANES AND HALOARENES
91106
Neopentyl bromide, undergoes dehydrohalogenation to give alkenes even though it has no hydrogen. This is due to
1 E2 mechanism
2 E1 mechanism
3 Rearrangement of carbocations by E1 mechanism
4 $\mathrm{E} 1 \mathrm{cB}$ mechanism
5 E1 mechanism
Explanation:
Neopentyl bromide $\left(\mathrm{C}_{5} \mathrm{H}_{11} \mathrm{Br}\right)$ give a carbocation as intermediate which undergo for rearrangement and show $\mathrm{E}_{1}$ mechanism (Even has no $\beta$ $\mathrm{H}$ atom).
**[Kerala CEE-2018]**
HALOALKANES AND HALOARENES
91107
The compound which does not lead to nitrile by substitution with $\mathrm{NaCN} / \mathrm{DMSO}$ is
1 benzyl chloride
2 ethyl chloride
3 isopropyl chloride
4 chlorobenzene
5 isobutyl chloride
Explanation:
In chlorobenzene, the lone pairs of electron on the chlorine atom are delocalized on the benzene ring $\mathrm{As}$ a result $\mathrm{C}-\mathrm{Cl}$ acquires some double bond character, hence difficult to break or substitute.