1 Addition of \(\mathrm{Br}_{2}\) on trans-2-Butene gives erythro product
2 Addition of \(\mathrm{Cl}_{2}\) on cis 2-Butene gives threo product
3 Addition of \(\mathrm{Br}_{2}\) on cis-2- Butene gives racemic mixture
4 All of these
Explanation:
Halogenation (addition of \(\mathrm{Cl}_{2}\) or \(\mathrm{Br}_{2}\) ) is anti addition. Cis-anti-racemic mixture, Trans-anti-mesoform. Two same groups-same side-erythro Two same groups-opposite side-threo.
CHXI13:HYDROCARBONS
318000
How many products will be formed in above reaction ?
1 2
2 4
3 6
4 5
Explanation:
No. of products \( = {2^{\text{n}}} = {2^2} = 4\)
CHXI13:HYDROCARBONS
318001
Assertion : Propene reacts with \(\mathrm{HBr}\) to give isopropyl bromide. Reason : Addition of hydrogen halide to alkenes follows Markownikoff's rule.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Addition of unsymmetrical reagent to unsymmetrical alkene takes place according to Markownikoff's rule, i.e., negative part of the addendum goes to the carbon atom with less number of hydrogen atoms. So, option (1) is correct.
CHXI13:HYDROCARBONS
318002
The treatment of propene with \(\mathrm{Cl}_{2}\) at \(500-600^{\circ} \mathrm{C}\) produces :
1 1, 2-Dichloropropene
2 Allyl chloride
3 2, 3-Dichloropropene
4 1, 3-Dichloropropene
Explanation:
At high temperature, \(\mathrm{Cl}_{2}\) does not add to alkenes. Chlorine molecule undergoes homolytic cleavage at high temperature forming \(\mathrm{Cl}\) radicals with initiate substitution reaction at the allylic position. Therefore, when propene reacts with \(\mathrm{Cl}_{2}\) at high temperature,allyl chloride is formed.\({\text{C}}{{\text{H}}_{\text{3}}}{\text{ - CH = C}}{{\text{H}}_{\text{2}}}{\text{ + C}}{{\text{l}}_{\text{2}}}\xrightarrow{{500 - 600^\circ {\text{C}}}}\) \({\text{Cl - C}}{{\text{H}}_{\text{2}}}{\text{ - CH = C}}{{\text{H}}_{\text{2}}}\)
CHXI13:HYDROCARBONS
318003
cis isomer of dichloroethane shows a dipole moment of 1.89 D . Give the sum of dipole moments exhibited by both geometrical isomers of dichloroethane.
1 0.1
2 0.75
3 1.89
4 2.52
Explanation:
Alkenes show geometrical isomerism Total dipole moment \({\mathrm{=1.89+0}}\) \({{\rm{\mu }}_{{\rm{total }}}}{\rm{ = 1}}{\rm{.89D}}\)
1 Addition of \(\mathrm{Br}_{2}\) on trans-2-Butene gives erythro product
2 Addition of \(\mathrm{Cl}_{2}\) on cis 2-Butene gives threo product
3 Addition of \(\mathrm{Br}_{2}\) on cis-2- Butene gives racemic mixture
4 All of these
Explanation:
Halogenation (addition of \(\mathrm{Cl}_{2}\) or \(\mathrm{Br}_{2}\) ) is anti addition. Cis-anti-racemic mixture, Trans-anti-mesoform. Two same groups-same side-erythro Two same groups-opposite side-threo.
CHXI13:HYDROCARBONS
318000
How many products will be formed in above reaction ?
1 2
2 4
3 6
4 5
Explanation:
No. of products \( = {2^{\text{n}}} = {2^2} = 4\)
CHXI13:HYDROCARBONS
318001
Assertion : Propene reacts with \(\mathrm{HBr}\) to give isopropyl bromide. Reason : Addition of hydrogen halide to alkenes follows Markownikoff's rule.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Addition of unsymmetrical reagent to unsymmetrical alkene takes place according to Markownikoff's rule, i.e., negative part of the addendum goes to the carbon atom with less number of hydrogen atoms. So, option (1) is correct.
CHXI13:HYDROCARBONS
318002
The treatment of propene with \(\mathrm{Cl}_{2}\) at \(500-600^{\circ} \mathrm{C}\) produces :
1 1, 2-Dichloropropene
2 Allyl chloride
3 2, 3-Dichloropropene
4 1, 3-Dichloropropene
Explanation:
At high temperature, \(\mathrm{Cl}_{2}\) does not add to alkenes. Chlorine molecule undergoes homolytic cleavage at high temperature forming \(\mathrm{Cl}\) radicals with initiate substitution reaction at the allylic position. Therefore, when propene reacts with \(\mathrm{Cl}_{2}\) at high temperature,allyl chloride is formed.\({\text{C}}{{\text{H}}_{\text{3}}}{\text{ - CH = C}}{{\text{H}}_{\text{2}}}{\text{ + C}}{{\text{l}}_{\text{2}}}\xrightarrow{{500 - 600^\circ {\text{C}}}}\) \({\text{Cl - C}}{{\text{H}}_{\text{2}}}{\text{ - CH = C}}{{\text{H}}_{\text{2}}}\)
CHXI13:HYDROCARBONS
318003
cis isomer of dichloroethane shows a dipole moment of 1.89 D . Give the sum of dipole moments exhibited by both geometrical isomers of dichloroethane.
1 0.1
2 0.75
3 1.89
4 2.52
Explanation:
Alkenes show geometrical isomerism Total dipole moment \({\mathrm{=1.89+0}}\) \({{\rm{\mu }}_{{\rm{total }}}}{\rm{ = 1}}{\rm{.89D}}\)
NEET Test Series from KOTA - 10 Papers In MS WORD
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CHXI13:HYDROCARBONS
317999
Select the correct statements:
1 Addition of \(\mathrm{Br}_{2}\) on trans-2-Butene gives erythro product
2 Addition of \(\mathrm{Cl}_{2}\) on cis 2-Butene gives threo product
3 Addition of \(\mathrm{Br}_{2}\) on cis-2- Butene gives racemic mixture
4 All of these
Explanation:
Halogenation (addition of \(\mathrm{Cl}_{2}\) or \(\mathrm{Br}_{2}\) ) is anti addition. Cis-anti-racemic mixture, Trans-anti-mesoform. Two same groups-same side-erythro Two same groups-opposite side-threo.
CHXI13:HYDROCARBONS
318000
How many products will be formed in above reaction ?
1 2
2 4
3 6
4 5
Explanation:
No. of products \( = {2^{\text{n}}} = {2^2} = 4\)
CHXI13:HYDROCARBONS
318001
Assertion : Propene reacts with \(\mathrm{HBr}\) to give isopropyl bromide. Reason : Addition of hydrogen halide to alkenes follows Markownikoff's rule.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Addition of unsymmetrical reagent to unsymmetrical alkene takes place according to Markownikoff's rule, i.e., negative part of the addendum goes to the carbon atom with less number of hydrogen atoms. So, option (1) is correct.
CHXI13:HYDROCARBONS
318002
The treatment of propene with \(\mathrm{Cl}_{2}\) at \(500-600^{\circ} \mathrm{C}\) produces :
1 1, 2-Dichloropropene
2 Allyl chloride
3 2, 3-Dichloropropene
4 1, 3-Dichloropropene
Explanation:
At high temperature, \(\mathrm{Cl}_{2}\) does not add to alkenes. Chlorine molecule undergoes homolytic cleavage at high temperature forming \(\mathrm{Cl}\) radicals with initiate substitution reaction at the allylic position. Therefore, when propene reacts with \(\mathrm{Cl}_{2}\) at high temperature,allyl chloride is formed.\({\text{C}}{{\text{H}}_{\text{3}}}{\text{ - CH = C}}{{\text{H}}_{\text{2}}}{\text{ + C}}{{\text{l}}_{\text{2}}}\xrightarrow{{500 - 600^\circ {\text{C}}}}\) \({\text{Cl - C}}{{\text{H}}_{\text{2}}}{\text{ - CH = C}}{{\text{H}}_{\text{2}}}\)
CHXI13:HYDROCARBONS
318003
cis isomer of dichloroethane shows a dipole moment of 1.89 D . Give the sum of dipole moments exhibited by both geometrical isomers of dichloroethane.
1 0.1
2 0.75
3 1.89
4 2.52
Explanation:
Alkenes show geometrical isomerism Total dipole moment \({\mathrm{=1.89+0}}\) \({{\rm{\mu }}_{{\rm{total }}}}{\rm{ = 1}}{\rm{.89D}}\)
1 Addition of \(\mathrm{Br}_{2}\) on trans-2-Butene gives erythro product
2 Addition of \(\mathrm{Cl}_{2}\) on cis 2-Butene gives threo product
3 Addition of \(\mathrm{Br}_{2}\) on cis-2- Butene gives racemic mixture
4 All of these
Explanation:
Halogenation (addition of \(\mathrm{Cl}_{2}\) or \(\mathrm{Br}_{2}\) ) is anti addition. Cis-anti-racemic mixture, Trans-anti-mesoform. Two same groups-same side-erythro Two same groups-opposite side-threo.
CHXI13:HYDROCARBONS
318000
How many products will be formed in above reaction ?
1 2
2 4
3 6
4 5
Explanation:
No. of products \( = {2^{\text{n}}} = {2^2} = 4\)
CHXI13:HYDROCARBONS
318001
Assertion : Propene reacts with \(\mathrm{HBr}\) to give isopropyl bromide. Reason : Addition of hydrogen halide to alkenes follows Markownikoff's rule.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Addition of unsymmetrical reagent to unsymmetrical alkene takes place according to Markownikoff's rule, i.e., negative part of the addendum goes to the carbon atom with less number of hydrogen atoms. So, option (1) is correct.
CHXI13:HYDROCARBONS
318002
The treatment of propene with \(\mathrm{Cl}_{2}\) at \(500-600^{\circ} \mathrm{C}\) produces :
1 1, 2-Dichloropropene
2 Allyl chloride
3 2, 3-Dichloropropene
4 1, 3-Dichloropropene
Explanation:
At high temperature, \(\mathrm{Cl}_{2}\) does not add to alkenes. Chlorine molecule undergoes homolytic cleavage at high temperature forming \(\mathrm{Cl}\) radicals with initiate substitution reaction at the allylic position. Therefore, when propene reacts with \(\mathrm{Cl}_{2}\) at high temperature,allyl chloride is formed.\({\text{C}}{{\text{H}}_{\text{3}}}{\text{ - CH = C}}{{\text{H}}_{\text{2}}}{\text{ + C}}{{\text{l}}_{\text{2}}}\xrightarrow{{500 - 600^\circ {\text{C}}}}\) \({\text{Cl - C}}{{\text{H}}_{\text{2}}}{\text{ - CH = C}}{{\text{H}}_{\text{2}}}\)
CHXI13:HYDROCARBONS
318003
cis isomer of dichloroethane shows a dipole moment of 1.89 D . Give the sum of dipole moments exhibited by both geometrical isomers of dichloroethane.
1 0.1
2 0.75
3 1.89
4 2.52
Explanation:
Alkenes show geometrical isomerism Total dipole moment \({\mathrm{=1.89+0}}\) \({{\rm{\mu }}_{{\rm{total }}}}{\rm{ = 1}}{\rm{.89D}}\)
1 Addition of \(\mathrm{Br}_{2}\) on trans-2-Butene gives erythro product
2 Addition of \(\mathrm{Cl}_{2}\) on cis 2-Butene gives threo product
3 Addition of \(\mathrm{Br}_{2}\) on cis-2- Butene gives racemic mixture
4 All of these
Explanation:
Halogenation (addition of \(\mathrm{Cl}_{2}\) or \(\mathrm{Br}_{2}\) ) is anti addition. Cis-anti-racemic mixture, Trans-anti-mesoform. Two same groups-same side-erythro Two same groups-opposite side-threo.
CHXI13:HYDROCARBONS
318000
How many products will be formed in above reaction ?
1 2
2 4
3 6
4 5
Explanation:
No. of products \( = {2^{\text{n}}} = {2^2} = 4\)
CHXI13:HYDROCARBONS
318001
Assertion : Propene reacts with \(\mathrm{HBr}\) to give isopropyl bromide. Reason : Addition of hydrogen halide to alkenes follows Markownikoff's rule.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Addition of unsymmetrical reagent to unsymmetrical alkene takes place according to Markownikoff's rule, i.e., negative part of the addendum goes to the carbon atom with less number of hydrogen atoms. So, option (1) is correct.
CHXI13:HYDROCARBONS
318002
The treatment of propene with \(\mathrm{Cl}_{2}\) at \(500-600^{\circ} \mathrm{C}\) produces :
1 1, 2-Dichloropropene
2 Allyl chloride
3 2, 3-Dichloropropene
4 1, 3-Dichloropropene
Explanation:
At high temperature, \(\mathrm{Cl}_{2}\) does not add to alkenes. Chlorine molecule undergoes homolytic cleavage at high temperature forming \(\mathrm{Cl}\) radicals with initiate substitution reaction at the allylic position. Therefore, when propene reacts with \(\mathrm{Cl}_{2}\) at high temperature,allyl chloride is formed.\({\text{C}}{{\text{H}}_{\text{3}}}{\text{ - CH = C}}{{\text{H}}_{\text{2}}}{\text{ + C}}{{\text{l}}_{\text{2}}}\xrightarrow{{500 - 600^\circ {\text{C}}}}\) \({\text{Cl - C}}{{\text{H}}_{\text{2}}}{\text{ - CH = C}}{{\text{H}}_{\text{2}}}\)
CHXI13:HYDROCARBONS
318003
cis isomer of dichloroethane shows a dipole moment of 1.89 D . Give the sum of dipole moments exhibited by both geometrical isomers of dichloroethane.
1 0.1
2 0.75
3 1.89
4 2.52
Explanation:
Alkenes show geometrical isomerism Total dipole moment \({\mathrm{=1.89+0}}\) \({{\rm{\mu }}_{{\rm{total }}}}{\rm{ = 1}}{\rm{.89D}}\)
