1
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0

An unsaturated hydrocarbon $[\mathrm{A}]$ undergoes the following series of reactions. Identify $[\mathrm{A}]$.

COMEDK 2025 Morning Shift Chemistry - Hydrocarbons Question 1 English

A
Propyne
B
But-2-yne
C
But-1-yne
D
But-2-ene
2
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0

Identify the compound which gives an optically active haloalkane on reaction with $\mathrm{H}_2$ / Ni on heating.

A B C D
COMEDK 2025 Morning Shift Chemistry - Haloalkanes and Haloarenes Question 2 English 1 COMEDK 2025 Morning Shift Chemistry - Haloalkanes and Haloarenes Question 2 English 2 COMEDK 2025 Morning Shift Chemistry - Haloalkanes and Haloarenes Question 2 English 3 COMEDK 2025 Morning Shift Chemistry - Haloalkanes and Haloarenes Question 2 English 4

A
A
B
B
C
D
D
C
3
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
For a given reaction of the type $\frac{3}{5} X(a q) \rightarrow \frac{1}{2} Y(a q)+Z(g)$, the correct expression for the rate of disappearance of $X$ with reference to $Y$ is ___________
A
$-d \frac{[X]}{d t}=+\frac{6}{5} d \frac{[Y]}{d t}$
B
$-d \frac{[X]}{d t}=+\frac{5}{6} d \frac{[Y]}{d t}$
C
$-d \frac{[X]}{d t}=+\frac{3}{10} d \frac{[Y]}{d t}$
D
$-d \frac{[X]}{d t}=d \frac{[Y]^{1 / 2}}{d t}$
4
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
Which one of the following statements is correct?.
A
The major product formed when 2- Methylpropene reacts with dilute $\mathrm{H}_2 \mathrm{SO}_4$ is tert. butyl alcohol.
B
The Electrophilic addition to an unsymmetrical alkene always occurs through the formation of a more stable Carbanion intermediate.
C
Between the two alkenes - (i) $\left(\mathrm{CH}_3\right)_2-\mathrm{C}=\mathrm{CH}-\mathrm{CH}_3$ and (ii). $\mathrm{C}_6 \mathrm{H}_5-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}_2-\mathrm{CH}_3$, compound (i) will show geometrical isomerism
D
Greater the number of alkyl groups attached to the double bonded Carbon atoms, the less stable is the alkene.
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