Among the following vinylic halide is _____. (a) $R-\underset{X}{\underset{|}{CH}}-R$ (b) $CH_2=CH-X$ (c) Benzene ring with X substituent directly attached to the ring (aryl halide structure) (d) $CH_2=CH-CH_2-X$

> > [!TLDR] > A vinylic halide has X on the double-bonded ($sp^2$) carbon itself: $CH_2=CH-X$. > > Halogen derivatives are classified by where the halogen atom is attached: > - Alkyl halide: X on an $sp^3$ carbon, e.g. option (a). > - Vinylic halide: X directly attached to an $sp^2$ carbon of a C=C double bond, e.g. $CH_2=CH-X$. …

Among the following vinylic halide is ___. (a) R-undersetXunderset|CH-R (b) CH₂=CH-X (c) Benzene ring with X s

Question 75 of 83

Q. Among the following vinylic halide is _____.

(a)

R-\underset{X}{\underset{|}{CH}}-R

(b)

CH_2=CH-X

(d)

CH_2=CH-CH_2-X

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A vinylic halide has X on the double-bonded ( $sp^2$ ) carbon itself: $CH_2=CH-X$ .

Halogen derivatives are classified by where the halogen atom is attached:

Alkyl halide: X on an $sp^3$ carbon, e.g. option (a).
Vinylic halide: X directly attached to an $sp^2$ carbon of a C=C double bond, e.g. $CH_2=CH-X$ . …

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Same / Similar Concept — real previous-year questions on the same or a closely similar concept, not this exact question.

CBSE 2025Set ANNUAL1 markMCQ
$Q. The position of -Br in the compound in CH3-CH=CHC(Br)(CH3)2 can be classified as$
(a) allyl
(b) aryl
(c) vinyl
(d) secondary
›Reveal solutionSolution

Number the chain to locate the double bond and the halogen-bearing carbon: the Br sits one carbon away from the C=C, the defining position of an allylic halide.

CH₃–CH=CH–C(Br)(CH₃)₂: label the chain C1(CH₃)–C2H=C3H–C4(Br)(CH₃)₂. The double bond is between C2 and C3; the bromine is on C4, which is bonded to C3 (an alkene carbon) but is itself sp³ and NOT part of the double bond. A halogen on an sp³ carbon directly attached to a C=C carbon (but not itself part of the double bond) defines an allylic halide — distinct from a vinylic halide (X directly on an alkene carbon) …

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CBSE 2024Set ANNUAL1 markMCQ
$Q. Among the following vinylic halide is _____.$
(a) $R-\underset{X}{\underset{|}{CH}}-R$
(b) $CH_2=CH-X$
(c) Benzene ring with X substituent directly attached to the ring (aryl halide structure)
(d) $CH_2=CH-CH_2-X$
›Reveal solutionSolution
A vinylic halide has X on the double-bonded ( $sp^2$ ) carbon itself: $CH_2=CH-X$ .

Halogen derivatives are classified by where the halogen atom is attached:

Alkyl halide: X on an $sp^3$ carbon, e.g. option (a).

Vinylic halide: X directly attached to an $sp^2$ carbon of a C=C double bond, e.g. $CH_2=CH-X$ . …
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CBSE 2023Set ANNUAL1 mark
$Q. What are vinylic halides?$
›Reveal solutionSolution

The halogen sits directly on one of the alkene's own double-bonded carbons, not on an adjacent (allylic) carbon.

In a vinylic halide, the C–X bond is on a carbon that is itself part of the C=C double bond (sp² hybridized), e.g. CH₂=CHCl. This is distinct from an allylic halide, where the halogen is on an sp³ carbon adjacent to (but not part of) the double bond, e.g. CH₂=CH–CH₂Cl. Vinylic (and aryl) C–X bonds are much less reactive towards nucleophilic substitution than a normal alkyl C–X bond, …

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CBSE 2023Set ANNUAL1 markMCQ
$Q. The allylic halide, among the following is _______.$
(a) $R-CH(X)-R$ (X on a carbon between two R groups, i.e. a secondary alkyl halide)
(b) $CH_2=CH-X$ (vinylic halide)
(c) an aryl halide: benzene ring with $X$ directly attached to the ring
(d) $CH_2=CH-CH_2-X$
›Reveal solutionSolution

An allylic halide has the halogen on an $sp^3$ carbon directly adjacent to a C=C double bond.

An allylic halide is one in which the halogen atom is attached to an $sp^3$ -hybridised carbon that is directly bonded to a carbon of a carbon-carbon double bond (i.e. $X$ is on the carbon next to $C=C$ ). Of the options: a secondary alkyl halide with no adjacent double bond is a simple alkyl halide; $CH_2=CH-X$ has $X$ directly on the double-bond carbon (vinylic halide, not allylic …

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CBSE 2020Set ANNUAL1 markMCQ
$Q. Which of the following is an example of vinylic-dihalide?$
(a) Dichloro ethane
(b) 1-2-dichloroethene
(c) Ethylene chloride
(d) Allyl chloride
›Reveal solutionSolution

A vinylic halide has the halogen on an sp $^2$ (C=C) carbon; 1,2-dichloroethene, ClCH=CHCl, has both Cl atoms directly on the double-bond carbons — option (b).

Vinylic halides are compounds in which the halogen atom is bonded directly to one of the carbon atoms of a C=C double bond (i.e. the halogen is on an sp $^2$ -hybridised vinylic carbon), e.g. CH $_2$ =CHCl (vinyl chloride). 1,2-Dichloroethene, Cl–CH=CH–Cl, has both chlorine atoms attached directly to the two alkene carbons, so it is a vinylic dihalide. Dichloroethane and ethylene chloride (which are actually the same compound, ClCH $_2$ CH $_2$ Cl) have the halogens on sp $^3$ (saturated) c …

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Q.Among the following vinylic halide is _____.

Concept understanding — Classification of Halogen Derivatives

Q.Among the following vinylic halide is _____.

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