Consider the following alcohols,

The order of decreasing reactivities of these alcohols towards nucleophilic substitution with $H B r$ is:

I I I > I > I V > I I

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I I I > I > I I > I V

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I > I I I > I V > I I

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I > I I I > I I > I V

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Solution

The correct option is C $I I I > I > I V > I I$

Reactivity towards alcohol is high when the carbocation formed is stabilized by electron donating groups like $- O C H_{3}, - O H$ and destabilizes by electron withdrawing groups like $N O_{2}, - B r$ .
(Refer to Image)

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Similar questions

Q. Arrange the following alcohols in the decreasing order of their ease of dehydration with

H_{2} S O_{4}

Q. Consider the following anions:

When attached to

s_{p^{3}}

-hybridized carbon, their leaving group ability in nucleophilic substitution reaction decreases in the order:

Arrange the following alcohols in order of increasing ease of dehydration
$C H_{3} C H_{2} O H$ $C_{6} H_{5} C H_{2} O H$
I II

$C l_{3} C C H_{2} O H$ $F_{3} C C H_{2} O H$
III IV

Arrange the following compounds in order of increasing reactivity towards nucleophilic substitution.

The decreasing nucleophilic order of the following compound is:

$(i) Θ C H_{3}$

$(i i) Θ N H_{2}$

$(i i i) Θ O H$

$(i v) Θ F$

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Consider the following alcohols,The order of decreasing reactivities of these alcohols towards nucleophilic substitution with HBr is:

The correct option is C III>I>IV>IIReactivity towards alcohol is high when the carbocation formed is stabilized by electron donating groups like −OCH3,−OH and destabilizes by electron withdrawing groups like NO2,−Br.(Refer to Image)

Consider the following alcohols,

The order of decreasing reactivities of these alcohols towards nucleophilic substitution with $H B r$ is:

The correct option is C $I I I > I > I V > I I$

Reactivity towards alcohol is high when the carbocation formed is stabilized by electron donating groups like $- O C H_{3}, - O H$ and destabilizes by electron withdrawing groups like $N O_{2}, - B r$ .
(Refer to Image)