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

Consider the following reaction

$$\text { Propyne }+\mathrm{CH}_3 \mathrm{MgBr} \xrightarrow{\text { dry ether }} \mathbf{X}$$

Identify ' X ' from the following.

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

Identify the type of reaction:

COMEDK 2025 Evening Shift Chemistry - Hydrocarbons Question 1 English

A
Electrophilic addition
B
Free radical substitution
C
Nucleophilic addition
D
Free radical addition
3
COMEDK 2025 Evening Shift
MCQ (Single Correct Answer)
+1
-0

Identify the Carbonyl compound which will not be formed when hydration of Alkynes is carried out with dil. $\mathrm{H}_2 \mathrm{SO}_4 / \mathrm{Hg}^{2+}$ at 333 K .

Acetone, Butanal, Ethanal, Butanone.

A
Acetone
B
Butanone
C
Butanal
D
Ethanal
4
COMEDK 2025 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0
An Alkene " X " on reaction with hot acidified $\mathrm{KMnO}_4$ gave a mixture of Ethanoic acid and Propanone. Identify " X ".
A
Pent-2-ene
B
2-Methylbut-2-ene.
C
But-2-ene
D
2,3 -Dimethylbut-2-ene
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