(B) The molecular formula $C_4H_8$ corresponds to alkenes for open chain structures.The possible isomers are:$1.$ $CH_2=CH-CH_2-CH_3$ (But-$1$-ene)$2.

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(B) The molecular formula $C_4H_8$ corresponds to alkenes for open chain structures.The possible isomers are:$1.$ $CH_2=CH-CH_2-CH_3$ (But-$1$-ene)$2.$ $CH_3-CH=CH-CH_3$ (But-$2$-ene,which exists as $cis$ and $trans$ geometrical isomers)$3.$ $CH_2=C(CH_3)-CH_3$ ($2$-Methylpropene)Total open chain structures = $1$ (But-$1$-ene) + $2$ ($cis$ and $trans$ But-$2$-ene) + $1$ ($2$-Methylpropene) = $4$.

Class 11 Chemistry 8-2.Organic Chemistry : Isomerism Mix Examples-General Organic Chemistry

Medium

What is the maximum number of open chain structures possible for $C_4H_8$?

A
$2$
B
$4$
C
$3$
D
$1$

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8-2.Organic Chemistry : Isomerism

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Mix Examples-General Organic Chemistry

Which carbocation is the most stable?

Medium

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The correct relationship between molecules $I$ and $II$ is:

EasyWBJEE 2022

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Match List-$I$ with List-$II$.
List-$I$ (Pair of Compounds) List-$II$ (Type of Isomers)
$A$. $2-$Methylpropene and but$-1-$ene $I$. Stereoisomers
$B$. $Cis-$but$-2-$ene and $trans-$but$-2-$ene $II$. Position isomers
$C$. $2-$Butanol and diethyl ether $III$. Chain isomers
$D$. But$-1-$ene and but$-2-$ene $IV$. Functional group isomers

Choose the correct answer from the options given below:

List-$I$ (Pair of Compounds)	List-$II$ (Type of Isomers)
$A$. $2-$Methylpropene and but$-1-$ene	$I$. Stereoisomers
$B$. $Cis-$but$-2-$ene and $trans-$but$-2-$ene	$II$. Position isomers
$C$. $2-$Butanol and diethyl ether	$III$. Chain isomers
$D$. But$-1-$ene and but$-2-$ene	$IV$. Functional group isomers

DifficultJEE MAIN 2026

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