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(C) Let us analyze each option:$A$: The stability of carbocations follows the order: $3^{\circ} > 2^{\circ} > 1^{\circ} > 	ext{methyl}$. Thus,$(CH_3)

Vedclass · Accepted Answer

Order of heat of hydrogenation: $2	ext{-methylbut-2-ene} > 2	ext{-methylbut-1-ene} > 3	ext{-methylbut-1-ene}$

Vedclass · Answer

(C) Let us analyze each option:$A$: The stability of carbocations follows the order: $3^{\circ} > 2^{\circ} > 1^{\circ} > 	ext{methyl}$. Thus,$(CH_3)_3C^{+} > (CH_3)_2CH^{+} > CH_3CH_2^+ > CH_3^+$ is correct.$B$: The stability of carbanions is inversely proportional to the $s$-character of the carbon atom. $sp$ hybridized carbon $(C \equiv C^-)$ has $50\%$ $s$-character,$sp^2$ $(C=C^-)$ has $33.3\%$,and $sp^3$ $(C-C^-)$ has $25\%$. Higher $s$-character makes the carbon more electronegative,stabilizing the negative charge. Thus,the order is correct.$C$: Heat of hydrogenation is inversely proportional to the stability of the alkene. More substituted alkenes are more stable and have lower heat of hydrogenation. The stability order is $2	ext{-methylbut-2-ene} > 2	ext{-methylbut-1-ene} > 3	ext{-methylbut-1-ene}$. Therefore,the heat of hydrogenation order should be $3	ext{-methylbut-1-ene} > 2	ext{-methylbut-1-ene} > 2	ext{-methylbut-2-ene}$. This option is incorrect.$D$: Heat of combustion is proportional to the number of carbon atoms and inversely proportional to the stability of the isomer. For isomers,the more branched isomer is more stable and has a lower heat of combustion. $n	ext{-butane}$ is less stable than isobutane,so it has a higher heat of combustion. This is correct.

Which of the following options given below is incorrect?

Similar Questions

Which of the following carbocations will not undergo rearrangement?

Which of the following has maximum stability?

The correct order of the relative stability of the following carbanions is:
$I$. $HC \equiv C^{-}$
$II$. $CH_2=CH-CH_2^{-}$
$III$. $H_2C=CH^{-}$
$IV$. $(C_6H_5)_2CH^{-}$

The most stable carbanion among the following is

The stability of the following carbocations decreases in the order:

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