318113
Which of the following catalyst/reagent is used to convert \(\mathrm{C} \equiv \mathrm{C}\) (triple bond) to \(\mathrm{C}=\mathrm{C}\) (double bond) to form cis isomer of alkene?
1 \(\mathrm{Na} /\) liquid \(\mathrm{NH}_{3}\)
2 \(\mathrm{Pd}-\mathrm{C}\), quinolone
3 \(\mathrm{ZnCl}_{2} / \mathrm{HCl}\)
4 \(\mathrm{Na} / \mathrm{Hg}\) in \(\mathrm{H}_{2} \mathrm{O}\)
Explanation:
Controlled reduction of alkynes. \(\mathrm{Na} /\) liq. \(\mathrm{NH}_{3}\) gives trans alkene.
MHTCET - 2021
CHXI13:HYDROCARBONS
318114
In the given reaction \({\text{C}}{{\text{H}}_{\text{3}}}{\text{ - C}} \equiv {\text{C - C}}{{\text{H}}_{\text{3}}}\xrightarrow{{{\text{Na/N}}{{\text{H}}_{\text{3}}}{\text{(e)}}}}[{\text{X}}]\) \([{\text{X}}]\) will be
1 Butane
2 trans-2-Butene
3 cis-2-Butene
4 1-Butene
Explanation:
Conceptual Questions
CHXI13:HYDROCARBONS
318115
\(\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{Br} \xrightarrow{\text { Alc. } \mathrm{KOH}}\) Final product is
1 propene
2 propanol
3 cyclopropane
4 propan-1,2-diol
Explanation:
When haloalkane with \({\rm{\beta }}\)-hydrogen atom is heated with alc. \(\mathrm{KOH}\) solution, then alkene is formed. Carbon and the halogen is lost from \(\alpha\)-carbon atom. As a result, an alkene is formed as a product. Due to the involvement of elimination of \(\beta\) hydrogen atom, the process is often called \(\beta\) elimination
CHXI13:HYDROCARBONS
318116
The reagent ' X ' used for the following reaction is
1 \(\mathrm{Ni}\)
2 \(\mathrm{Pd} / \mathrm{C}\)
3 \(\mathrm{LiAlH}_{4}\)
4 \(\mathrm{Na} /\) liquid \(\mathrm{NH}_{3}\)
Explanation:
cis-Alkene is obtained by using \(\mathrm{Pd} / \mathrm{C}\) is a catalyst. trans-alkene is obtained by using Na\(\mathrm{NH}_{3}\) liquid.
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CHXI13:HYDROCARBONS
318113
Which of the following catalyst/reagent is used to convert \(\mathrm{C} \equiv \mathrm{C}\) (triple bond) to \(\mathrm{C}=\mathrm{C}\) (double bond) to form cis isomer of alkene?
1 \(\mathrm{Na} /\) liquid \(\mathrm{NH}_{3}\)
2 \(\mathrm{Pd}-\mathrm{C}\), quinolone
3 \(\mathrm{ZnCl}_{2} / \mathrm{HCl}\)
4 \(\mathrm{Na} / \mathrm{Hg}\) in \(\mathrm{H}_{2} \mathrm{O}\)
Explanation:
Controlled reduction of alkynes. \(\mathrm{Na} /\) liq. \(\mathrm{NH}_{3}\) gives trans alkene.
MHTCET - 2021
CHXI13:HYDROCARBONS
318114
In the given reaction \({\text{C}}{{\text{H}}_{\text{3}}}{\text{ - C}} \equiv {\text{C - C}}{{\text{H}}_{\text{3}}}\xrightarrow{{{\text{Na/N}}{{\text{H}}_{\text{3}}}{\text{(e)}}}}[{\text{X}}]\) \([{\text{X}}]\) will be
1 Butane
2 trans-2-Butene
3 cis-2-Butene
4 1-Butene
Explanation:
Conceptual Questions
CHXI13:HYDROCARBONS
318115
\(\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{Br} \xrightarrow{\text { Alc. } \mathrm{KOH}}\) Final product is
1 propene
2 propanol
3 cyclopropane
4 propan-1,2-diol
Explanation:
When haloalkane with \({\rm{\beta }}\)-hydrogen atom is heated with alc. \(\mathrm{KOH}\) solution, then alkene is formed. Carbon and the halogen is lost from \(\alpha\)-carbon atom. As a result, an alkene is formed as a product. Due to the involvement of elimination of \(\beta\) hydrogen atom, the process is often called \(\beta\) elimination
CHXI13:HYDROCARBONS
318116
The reagent ' X ' used for the following reaction is
1 \(\mathrm{Ni}\)
2 \(\mathrm{Pd} / \mathrm{C}\)
3 \(\mathrm{LiAlH}_{4}\)
4 \(\mathrm{Na} /\) liquid \(\mathrm{NH}_{3}\)
Explanation:
cis-Alkene is obtained by using \(\mathrm{Pd} / \mathrm{C}\) is a catalyst. trans-alkene is obtained by using Na\(\mathrm{NH}_{3}\) liquid.
318113
Which of the following catalyst/reagent is used to convert \(\mathrm{C} \equiv \mathrm{C}\) (triple bond) to \(\mathrm{C}=\mathrm{C}\) (double bond) to form cis isomer of alkene?
1 \(\mathrm{Na} /\) liquid \(\mathrm{NH}_{3}\)
2 \(\mathrm{Pd}-\mathrm{C}\), quinolone
3 \(\mathrm{ZnCl}_{2} / \mathrm{HCl}\)
4 \(\mathrm{Na} / \mathrm{Hg}\) in \(\mathrm{H}_{2} \mathrm{O}\)
Explanation:
Controlled reduction of alkynes. \(\mathrm{Na} /\) liq. \(\mathrm{NH}_{3}\) gives trans alkene.
MHTCET - 2021
CHXI13:HYDROCARBONS
318114
In the given reaction \({\text{C}}{{\text{H}}_{\text{3}}}{\text{ - C}} \equiv {\text{C - C}}{{\text{H}}_{\text{3}}}\xrightarrow{{{\text{Na/N}}{{\text{H}}_{\text{3}}}{\text{(e)}}}}[{\text{X}}]\) \([{\text{X}}]\) will be
1 Butane
2 trans-2-Butene
3 cis-2-Butene
4 1-Butene
Explanation:
Conceptual Questions
CHXI13:HYDROCARBONS
318115
\(\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{Br} \xrightarrow{\text { Alc. } \mathrm{KOH}}\) Final product is
1 propene
2 propanol
3 cyclopropane
4 propan-1,2-diol
Explanation:
When haloalkane with \({\rm{\beta }}\)-hydrogen atom is heated with alc. \(\mathrm{KOH}\) solution, then alkene is formed. Carbon and the halogen is lost from \(\alpha\)-carbon atom. As a result, an alkene is formed as a product. Due to the involvement of elimination of \(\beta\) hydrogen atom, the process is often called \(\beta\) elimination
CHXI13:HYDROCARBONS
318116
The reagent ' X ' used for the following reaction is
1 \(\mathrm{Ni}\)
2 \(\mathrm{Pd} / \mathrm{C}\)
3 \(\mathrm{LiAlH}_{4}\)
4 \(\mathrm{Na} /\) liquid \(\mathrm{NH}_{3}\)
Explanation:
cis-Alkene is obtained by using \(\mathrm{Pd} / \mathrm{C}\) is a catalyst. trans-alkene is obtained by using Na\(\mathrm{NH}_{3}\) liquid.
318113
Which of the following catalyst/reagent is used to convert \(\mathrm{C} \equiv \mathrm{C}\) (triple bond) to \(\mathrm{C}=\mathrm{C}\) (double bond) to form cis isomer of alkene?
1 \(\mathrm{Na} /\) liquid \(\mathrm{NH}_{3}\)
2 \(\mathrm{Pd}-\mathrm{C}\), quinolone
3 \(\mathrm{ZnCl}_{2} / \mathrm{HCl}\)
4 \(\mathrm{Na} / \mathrm{Hg}\) in \(\mathrm{H}_{2} \mathrm{O}\)
Explanation:
Controlled reduction of alkynes. \(\mathrm{Na} /\) liq. \(\mathrm{NH}_{3}\) gives trans alkene.
MHTCET - 2021
CHXI13:HYDROCARBONS
318114
In the given reaction \({\text{C}}{{\text{H}}_{\text{3}}}{\text{ - C}} \equiv {\text{C - C}}{{\text{H}}_{\text{3}}}\xrightarrow{{{\text{Na/N}}{{\text{H}}_{\text{3}}}{\text{(e)}}}}[{\text{X}}]\) \([{\text{X}}]\) will be
1 Butane
2 trans-2-Butene
3 cis-2-Butene
4 1-Butene
Explanation:
Conceptual Questions
CHXI13:HYDROCARBONS
318115
\(\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{Br} \xrightarrow{\text { Alc. } \mathrm{KOH}}\) Final product is
1 propene
2 propanol
3 cyclopropane
4 propan-1,2-diol
Explanation:
When haloalkane with \({\rm{\beta }}\)-hydrogen atom is heated with alc. \(\mathrm{KOH}\) solution, then alkene is formed. Carbon and the halogen is lost from \(\alpha\)-carbon atom. As a result, an alkene is formed as a product. Due to the involvement of elimination of \(\beta\) hydrogen atom, the process is often called \(\beta\) elimination
CHXI13:HYDROCARBONS
318116
The reagent ' X ' used for the following reaction is
1 \(\mathrm{Ni}\)
2 \(\mathrm{Pd} / \mathrm{C}\)
3 \(\mathrm{LiAlH}_{4}\)
4 \(\mathrm{Na} /\) liquid \(\mathrm{NH}_{3}\)
Explanation:
cis-Alkene is obtained by using \(\mathrm{Pd} / \mathrm{C}\) is a catalyst. trans-alkene is obtained by using Na\(\mathrm{NH}_{3}\) liquid.
