1
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.
2
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

A Hydrocarbon [A] (molecular formula $$\mathrm{C}_3 \mathrm{H}_6$$) on reaction with $$\mathrm{Br}_2 / \mathrm{CCl}_4$$ gave [B]. When [B] is heated with 2 moles of alcoholic $$\mathrm{KOH}$$, it gave compound [C]. 3 moles of Compound [C] when passed through red hot Iron tube forms [D]. Identify [D].

A
Polypropene
B
Benzene
C
Polystyrene
D
1, 3, 5- Trimethylbenzene
3
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

Identify the product $$[\mathrm{C}]$$ formed at the end of the reaction below

1,1,2,2- Tetrabromopropane + 2 $$\mathrm{Zn}_{(\mathrm{S})}$$ / Ethanol $$\rightarrow$$ [B]

$$[\mathrm{B}]$$ + 2 moles of $$\mathrm{HBr} \rightarrow[\mathrm{C}]$$

A
2, 2-Dibromopropane
B
1, 1- Dibromopropane
C
1,3-Dibromopropane
D
1, 2-Dibromopropane
4
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

Given below are 4 reactions. Two of these reactions will give product which is an equimolar mixture of the d and 1 forms. Identify these 2 reactions.

[A] 2- Methylpropene + $$\mathrm{HI} \rightarrow$$ ---------

[B] But-1-ene + $$\mathrm{HBr} \rightarrow$$ -----------

[C] 3-Methylbut-1-ene + $$\mathrm{HI} \rightarrow$$ -----------

[D] 3- Phenylpropene + $$\mathrm{HBr}$$ (Peroxide) $$\rightarrow$$ -----------

A
C & A
B
D & B
C
B & C
D
A & D
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