1
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

$$ \text { Identify the aromatic compounds among the given set based on Huckel's rule: } $$

COMEDK 2026 Afternoon Shift Chemistry - General Organic Chemistry Question 3 English
A

I, II, III

B

II, III, IV

C

I, II, IV

D

I, III, IV

2
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

In the redox reaction, taking place in acidic medium: $\mathrm{X} \mathrm{MnO}_4^{-}(\mathrm{aq})+\mathrm{YSO}_2(\mathrm{~g}) \rightarrow \mathrm{Mn}^{+2}(\mathrm{aq})+\mathrm{HSO}_4^{-}(\mathrm{aq})$, the ratio of $X: Y$ in a stoichiometrically balanced equation will be

A

$5:2$

B

$1:2$

C

$2:5$

D

$2: 3$

3
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

At $30^{\circ} \mathrm{C}$ the solubility of $\mathrm{PbI}_2$ salt in 0.2 M KI solution will be $X$, if the solubility product of $\mathrm{PbI}_2$ at $30^{\circ} \mathrm{C}$ is $2.4 \times 10^{-8}$. Identify the value of $X$.

A

$4.8 \times 10^{-7} \mathrm{M}$

B

$6.0 \times 10^{-7} \mathrm{M}$

C

$2.4 \times 10^{-8} \mathrm{M}$

D

$3.0 \times 10^{-8} \mathrm{M}$

4
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

An unsaturated organic compound $\left(\mathrm{C}_3 \mathrm{H}_6\right)$, undergoes the following series of reactions:

COMEDK 2026 Afternoon Shift Chemistry - Hydrocarbons Question 2 English

Identify compound [D]

A

Cyclohexane

B

2,3-dimethylbutane

C

Hexane

D

2-methyl pentane