COMEDK 2026 Morning Shift | Haloalkanes and Haloarenes Question 4 | Chemistry

Reason: The energy required to cleave $\mathrm{C}-\mathrm{Br}$ is taken from the energy released due to Inductive effect and hyper-conjugative effect.

Assertion is correct but Reason is wrong

Reason is correct but Assertion is wrong

Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion

Both Assertion and Reason are correct and Reason is the correct explanation of Assertion

COMEDK 2025 Evening Shift

MCQ (Single Correct Answer)

-0

The correct order of reactivity of halogens with alkanes is :

$\mathrm{F}_2>\mathrm{Cl}_2>\mathrm{Br}_2>\mathrm{I}_2$

$\mathrm{F}_2>\mathrm{Br}_2>\mathrm{Cl}_2>\mathrm{I}_2$

$\mathrm{Cl}_2>\mathrm{F}_2>\mathrm{Br}_2>\mathrm{I}_2$

$\mathrm{I_2>B r_2>C l_2>F_2}$

COMEDK 2025 Afternoon Shift

MCQ (Single Correct Answer)

-0

Choose the incorrect statement from the following.

$\mathrm{CH}_2 \mathrm{Cl}_2$ is widely used as a propellant in aerosols.

DDT was widely used because of its effectiveness against mosquitos that spread malaria

Freon 1, 2 is manufactured from trichloromethane by Swartz reaction

Antiseptic property of Iodoform is due to the liberation of $I_2$ when it comes in contact with skin

COMEDK 2025 Afternoon Shift

MCQ (Single Correct Answer)

-0

Identify the incorrect statement.

When (一)-2-bromooctane is reacted with aqueous KOH , the substitution follows $\mathrm{S}_{\mathrm{N}} 2$ mechanism and product formed is (一) -Octan-2-ol.

Benzylic halides show higher reactivity towards $S_N 1$ reaction.

The reaction of $\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2-\mathrm{CHCl}-\mathrm{C}_6 \mathrm{H}_5$ with alc. KOH on heating yields two products.

Optically active (-)-2-Methylbutan-1-ol on reaction with HCl yields a product $(+)$-1-Chloro-2-methylbutane.

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Chemistry

Physical Chemistry

Some Basic Concepts of Chemistry Atomic Structure States of Matter Thermodynamics Chemical Equilibrium Ionic Equilibrium Liquid Solution Redox Reactions Surface Chemistry Solid State Electrochemistry Chemical Kinetics Nuclear Chemistry

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Metallurgy Periodic Table and Periodicity Hydrogen and It's Compounds p-Block Elements Environmental Chemistry Coordination Compounds d and f Block Elements s-Block Elements Chemical Bonding and Molecular Structure

Organic Chemistry

IUPAC Nomenclatures General Organic Chemistry Isomerism Hydrocarbons Haloalkanes and Haloarenes Alcohol, Phenols and Ethers Aldehyde and Ketone Carboxylic Acids and Its Derivatives Compounds Containing Nitrogen Polymers Biomolecules Chemistry in Everyday Life Practical Organic Chemistry