COMEDK 2024 Evening Shift | Haloalkanes and Haloarenes Question 5 | Chemistry

$$ \mathrm{C}=\text { o-nitrobromobenzene } \mathrm{D}=\mathrm{m} \text {-nitrobromobenzene } \quad \mathrm{F}=\mathrm{p} \text {-nitrobromobenzene } $$

$$ \mathrm{C}=\mathrm{o} \text {-nitrobromobenzene } \mathrm{D}=\mathrm{p} \text {-nitrobromobenzene } \mathrm{F}=\mathrm{m} \text {-nitrobromobenzene } $$

$$ \mathrm{C}=\mathrm{m} \text {-nitrobromobenzene } \mathrm{D}=\mathrm{p} \text {-nitrobromobenzene } \mathrm{F}=\text { o-nitrobromobenzene } $$

COMEDK 2024 Afternoon Shift

MCQ (Single Correct Answer)

-0

Arrange the following compounds in the decreasing order of reactivity towards electrophilic substitution reaction.

(I) Chlorobenzene

(II) Nitrobenzene

(III) Benzene

(IV) Isopropylbenzene

$$ \text { IV }>\text { III }>\text { I }>\text { II } $$

$$ \mathrm{I}>\mathrm{II}>\mathrm{IV}>\mathrm{III} $$

$$ \mathrm{IV}>\mathrm{I}>\mathrm{II}>\mathrm{III} $$

$$ \mathrm{III}>\mathrm{II}>\mathrm{IV}>\mathrm{I} $$

COMEDK 2024 Afternoon Shift

MCQ (Single Correct Answer)

-0

Arrange the following in the order of increasing reactivity towards $$\mathrm{SN}_{\mathrm{2}}$$ reactions.

$$\begin{array}{ll} \left(\mathrm{CH}_3\right)_3 \mathrm{CCH}_2 \mathrm{Br}(\mathrm{P}) ; & \\\mathrm{CH}_3\left(\mathrm{CH}_2\right)_3 \mathrm{Br}(\mathrm{Q}) ; &\\ \mathrm{CH}_3 \mathrm{CH}_2-\mathrm{CH}\left(\mathrm{CH}_3\right)-\mathrm{CH}_2 \mathrm{Br}(\mathrm{R}) ; & \\\left(\mathrm{CH}_3\right)_2 \mathrm{CHCH}_2 \mathrm{CH}_2 \mathrm{Br}(\mathrm{S}) \end{array}$$

$$ \mathrm{R}<\mathrm{P}<\mathrm{Q}<\mathrm{S} $$

$$ \mathrm{P}<\mathrm{Q}<\mathrm{R}<\mathrm{S} $$

$$ \mathrm{P}<\mathrm{R}<\mathrm{S}<\mathrm{Q} $$

$$ \mathrm{Q}<\mathrm{S}<\mathrm{R}<\mathrm{P} $$

COMEDK 2024 Afternoon Shift

MCQ (Single Correct Answer)

-0

Choose the incorrect statement from the following.

Carbon tetrachloride is used as a preservative for anatomical specimens

Freon-12 acts as a propellant in aerosol sprays

Dichloromethane is used as a solvent in drug industry

DDT is useful to protect crops and to kill mosquitoes that spread malaria

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