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1
COMEDK 2025 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0
Choose the incorrect statement from the following.
A
$\mathrm{CH}_2 \mathrm{Cl}_2$ is widely used as a propellant in aerosols.
B
DDT was widely used because of its effectiveness against mosquitos that spread malaria
C
Freon 1, 2 is manufactured from trichloromethane by Swartz reaction
D
Antiseptic property of Iodoform is due to the liberation of $I_2$ when it comes in contact with skin
2
COMEDK 2025 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0
Identify the incorrect statement.
A
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.
B
Benzylic halides show higher reactivity towards $S_N 1$ reaction.
C
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.
D
Optically active (-)-2-Methylbutan-1-ol on reaction with HCl yields a product $(+)$-1-Chloro-2-methylbutane.
3
COMEDK 2025 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0
Toluene when reacted with $\mathrm{Cl}_2$ gas at 385 K forms a product X which undergoes further reaction with Sodium ethoxide to yield product Y . The structure of Y is ___________ .
A
COMEDK 2025 Afternoon Shift Chemistry - Haloalkanes and Haloarenes Question 2 English Option 1
B
COMEDK 2025 Afternoon Shift Chemistry - Haloalkanes and Haloarenes Question 2 English Option 2
C
COMEDK 2025 Afternoon Shift Chemistry - Haloalkanes and Haloarenes Question 2 English Option 3
D
COMEDK 2025 Afternoon Shift Chemistry - Haloalkanes and Haloarenes Question 2 English Option 4
4
COMEDK 2025 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

Identify the reagents to be used to complete the given reaction.

COMEDK 2025 Afternoon Shift Chemistry - Haloalkanes and Haloarenes Question 1 English

A
$\mathrm{A}=\mathrm{Br}_2 / \mathrm{CCl}_4 \quad \mathrm{~B}=$ alc. $\mathrm{KOH} \quad \mathrm{C}=\mathrm{NaNH}_2 \quad \mathrm{D}=$ Red hot Fe tube
B
$\mathrm{A}=\mathrm{HBr} \quad \mathrm{B}=$ alc. $\mathrm{KOH} \quad \mathrm{C}=\mathrm{CaC}_2 \quad \mathrm{D}=$ Red hot Ni tube
C
$A=\mathrm{CHBr}_3 \quad B=$ aq. $\mathrm{KOH} \quad C=$ Conc. $\mathrm{HI} \quad D=$ Red hot Pd tube
D
$\mathrm{A}=\mathrm{Br}_2 / \mathrm{CCl}_4 \quad \mathrm{~B}=$ aq. $\mathrm{KOH} \quad \mathrm{C}=$ Conc. $\mathrm{H}_2 \mathrm{SO}_4 \quad \mathrm{D}=$ Red hot Cu tube
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