317986
Assertion : Addition of bromine to trans-2-butene yields meso-2, 3-dibromobutane. Reason : Bromine addition to an alkene is an electrophilic addition.
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:
Transalkene -anti addition-meso product. It is an example of anti-addition. So, option (2) is correct.
CHXI13:HYDROCARBONS
317987
Assertion : Propene and cyclopropane both give addition reactions only Reason : Propene and cyclopropane are ring chain isomers.
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:
Cyclopropane gives substitution reactions only.
CHXI13:HYDROCARBONS
317988
The product formed in this reaction will be
1 An optically active compound
2 A racemic mixture
3 A mixture of diastereomers
4 An optically inactive compound
Explanation:
CHXI13:HYDROCARBONS
317989
The reactivity of the given alkenes towards hydrogen is
1 \(\mathrm{A}>\mathrm{B}>\mathrm{C}\)
2 \(\mathrm{A}>\mathrm{C}>\mathrm{B}\)
3 \(\mathrm{C}>\mathrm{A}>\mathrm{B}\)
4 \(\mathrm{C}>\mathrm{B}>\mathrm{A}\)
Explanation:
The reactivity of alkenes towards hydrogen depends on the hyperconjugation effect in the alkene. More the hyperconjugation effect, more is the stability of alkene and lesser is the reactivity. The hyperconjugation effect will depend on the number of alpha hydrogen atoms. "A" has three alpha hydrogen atoms, "B" has six and "C" has nine. The hyperconjugation effect in the given alkene is \(\mathrm{B}>\mathrm{A}>\mathrm{C}\). Thus, stability is \(\mathrm{B}>\) \(\mathrm{A}>\mathrm{C}\) and hence reactivity of alkene with \(\mathrm{H}_{2}\) is in the order \(\mathrm{C}>\mathrm{A}>\) \(\mathrm{B}\).
CHXI13:HYDROCARBONS
317990
Assertion : Trans-2-butene on reaction with \(\mathrm{Br}\) gives meso-2,3-dibromobutane. Reason : The reaction involves syn-addition of bromine.
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:
With trans-2-butene, the product of \(\mathrm{Br}_{2}\) addition is optically inactive due to the formation of symmetrical meso-compounds. Addition of \(\mathrm{Br}_{2}\) is anti addition. So, option (3) is correct.
317986
Assertion : Addition of bromine to trans-2-butene yields meso-2, 3-dibromobutane. Reason : Bromine addition to an alkene is an electrophilic addition.
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:
Transalkene -anti addition-meso product. It is an example of anti-addition. So, option (2) is correct.
CHXI13:HYDROCARBONS
317987
Assertion : Propene and cyclopropane both give addition reactions only Reason : Propene and cyclopropane are ring chain isomers.
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:
Cyclopropane gives substitution reactions only.
CHXI13:HYDROCARBONS
317988
The product formed in this reaction will be
1 An optically active compound
2 A racemic mixture
3 A mixture of diastereomers
4 An optically inactive compound
Explanation:
CHXI13:HYDROCARBONS
317989
The reactivity of the given alkenes towards hydrogen is
1 \(\mathrm{A}>\mathrm{B}>\mathrm{C}\)
2 \(\mathrm{A}>\mathrm{C}>\mathrm{B}\)
3 \(\mathrm{C}>\mathrm{A}>\mathrm{B}\)
4 \(\mathrm{C}>\mathrm{B}>\mathrm{A}\)
Explanation:
The reactivity of alkenes towards hydrogen depends on the hyperconjugation effect in the alkene. More the hyperconjugation effect, more is the stability of alkene and lesser is the reactivity. The hyperconjugation effect will depend on the number of alpha hydrogen atoms. "A" has three alpha hydrogen atoms, "B" has six and "C" has nine. The hyperconjugation effect in the given alkene is \(\mathrm{B}>\mathrm{A}>\mathrm{C}\). Thus, stability is \(\mathrm{B}>\) \(\mathrm{A}>\mathrm{C}\) and hence reactivity of alkene with \(\mathrm{H}_{2}\) is in the order \(\mathrm{C}>\mathrm{A}>\) \(\mathrm{B}\).
CHXI13:HYDROCARBONS
317990
Assertion : Trans-2-butene on reaction with \(\mathrm{Br}\) gives meso-2,3-dibromobutane. Reason : The reaction involves syn-addition of bromine.
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:
With trans-2-butene, the product of \(\mathrm{Br}_{2}\) addition is optically inactive due to the formation of symmetrical meso-compounds. Addition of \(\mathrm{Br}_{2}\) is anti addition. So, option (3) is correct.
317986
Assertion : Addition of bromine to trans-2-butene yields meso-2, 3-dibromobutane. Reason : Bromine addition to an alkene is an electrophilic addition.
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:
Transalkene -anti addition-meso product. It is an example of anti-addition. So, option (2) is correct.
CHXI13:HYDROCARBONS
317987
Assertion : Propene and cyclopropane both give addition reactions only Reason : Propene and cyclopropane are ring chain isomers.
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:
Cyclopropane gives substitution reactions only.
CHXI13:HYDROCARBONS
317988
The product formed in this reaction will be
1 An optically active compound
2 A racemic mixture
3 A mixture of diastereomers
4 An optically inactive compound
Explanation:
CHXI13:HYDROCARBONS
317989
The reactivity of the given alkenes towards hydrogen is
1 \(\mathrm{A}>\mathrm{B}>\mathrm{C}\)
2 \(\mathrm{A}>\mathrm{C}>\mathrm{B}\)
3 \(\mathrm{C}>\mathrm{A}>\mathrm{B}\)
4 \(\mathrm{C}>\mathrm{B}>\mathrm{A}\)
Explanation:
The reactivity of alkenes towards hydrogen depends on the hyperconjugation effect in the alkene. More the hyperconjugation effect, more is the stability of alkene and lesser is the reactivity. The hyperconjugation effect will depend on the number of alpha hydrogen atoms. "A" has three alpha hydrogen atoms, "B" has six and "C" has nine. The hyperconjugation effect in the given alkene is \(\mathrm{B}>\mathrm{A}>\mathrm{C}\). Thus, stability is \(\mathrm{B}>\) \(\mathrm{A}>\mathrm{C}\) and hence reactivity of alkene with \(\mathrm{H}_{2}\) is in the order \(\mathrm{C}>\mathrm{A}>\) \(\mathrm{B}\).
CHXI13:HYDROCARBONS
317990
Assertion : Trans-2-butene on reaction with \(\mathrm{Br}\) gives meso-2,3-dibromobutane. Reason : The reaction involves syn-addition of bromine.
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:
With trans-2-butene, the product of \(\mathrm{Br}_{2}\) addition is optically inactive due to the formation of symmetrical meso-compounds. Addition of \(\mathrm{Br}_{2}\) is anti addition. So, option (3) is correct.
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CHXI13:HYDROCARBONS
317986
Assertion : Addition of bromine to trans-2-butene yields meso-2, 3-dibromobutane. Reason : Bromine addition to an alkene is an electrophilic addition.
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:
Transalkene -anti addition-meso product. It is an example of anti-addition. So, option (2) is correct.
CHXI13:HYDROCARBONS
317987
Assertion : Propene and cyclopropane both give addition reactions only Reason : Propene and cyclopropane are ring chain isomers.
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:
Cyclopropane gives substitution reactions only.
CHXI13:HYDROCARBONS
317988
The product formed in this reaction will be
1 An optically active compound
2 A racemic mixture
3 A mixture of diastereomers
4 An optically inactive compound
Explanation:
CHXI13:HYDROCARBONS
317989
The reactivity of the given alkenes towards hydrogen is
1 \(\mathrm{A}>\mathrm{B}>\mathrm{C}\)
2 \(\mathrm{A}>\mathrm{C}>\mathrm{B}\)
3 \(\mathrm{C}>\mathrm{A}>\mathrm{B}\)
4 \(\mathrm{C}>\mathrm{B}>\mathrm{A}\)
Explanation:
The reactivity of alkenes towards hydrogen depends on the hyperconjugation effect in the alkene. More the hyperconjugation effect, more is the stability of alkene and lesser is the reactivity. The hyperconjugation effect will depend on the number of alpha hydrogen atoms. "A" has three alpha hydrogen atoms, "B" has six and "C" has nine. The hyperconjugation effect in the given alkene is \(\mathrm{B}>\mathrm{A}>\mathrm{C}\). Thus, stability is \(\mathrm{B}>\) \(\mathrm{A}>\mathrm{C}\) and hence reactivity of alkene with \(\mathrm{H}_{2}\) is in the order \(\mathrm{C}>\mathrm{A}>\) \(\mathrm{B}\).
CHXI13:HYDROCARBONS
317990
Assertion : Trans-2-butene on reaction with \(\mathrm{Br}\) gives meso-2,3-dibromobutane. Reason : The reaction involves syn-addition of bromine.
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:
With trans-2-butene, the product of \(\mathrm{Br}_{2}\) addition is optically inactive due to the formation of symmetrical meso-compounds. Addition of \(\mathrm{Br}_{2}\) is anti addition. So, option (3) is correct.
317986
Assertion : Addition of bromine to trans-2-butene yields meso-2, 3-dibromobutane. Reason : Bromine addition to an alkene is an electrophilic addition.
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:
Transalkene -anti addition-meso product. It is an example of anti-addition. So, option (2) is correct.
CHXI13:HYDROCARBONS
317987
Assertion : Propene and cyclopropane both give addition reactions only Reason : Propene and cyclopropane are ring chain isomers.
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:
Cyclopropane gives substitution reactions only.
CHXI13:HYDROCARBONS
317988
The product formed in this reaction will be
1 An optically active compound
2 A racemic mixture
3 A mixture of diastereomers
4 An optically inactive compound
Explanation:
CHXI13:HYDROCARBONS
317989
The reactivity of the given alkenes towards hydrogen is
1 \(\mathrm{A}>\mathrm{B}>\mathrm{C}\)
2 \(\mathrm{A}>\mathrm{C}>\mathrm{B}\)
3 \(\mathrm{C}>\mathrm{A}>\mathrm{B}\)
4 \(\mathrm{C}>\mathrm{B}>\mathrm{A}\)
Explanation:
The reactivity of alkenes towards hydrogen depends on the hyperconjugation effect in the alkene. More the hyperconjugation effect, more is the stability of alkene and lesser is the reactivity. The hyperconjugation effect will depend on the number of alpha hydrogen atoms. "A" has three alpha hydrogen atoms, "B" has six and "C" has nine. The hyperconjugation effect in the given alkene is \(\mathrm{B}>\mathrm{A}>\mathrm{C}\). Thus, stability is \(\mathrm{B}>\) \(\mathrm{A}>\mathrm{C}\) and hence reactivity of alkene with \(\mathrm{H}_{2}\) is in the order \(\mathrm{C}>\mathrm{A}>\) \(\mathrm{B}\).
CHXI13:HYDROCARBONS
317990
Assertion : Trans-2-butene on reaction with \(\mathrm{Br}\) gives meso-2,3-dibromobutane. Reason : The reaction involves syn-addition of bromine.
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:
With trans-2-butene, the product of \(\mathrm{Br}_{2}\) addition is optically inactive due to the formation of symmetrical meso-compounds. Addition of \(\mathrm{Br}_{2}\) is anti addition. So, option (3) is correct.
