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

Identify the name of the reaction involved in conversion of $A \rightarrow B$ and name the compound $B$.

$$ \mathrm{CH}_3 \mathrm{CN} \xrightarrow[\mathrm{H}_2 \mathrm{O}]{\mathrm{H}^{+}} \mathrm{A}-\xrightarrow[\mathrm{H}^{+} / \mathrm{H}_2 \mathrm{O}]{\mathrm{Cl}_2 / \text { Red Phosphorous }} \mathrm{B} $$

A

Kolbe's reaction, Ethanoic acid

B

Esterification, methyl ethanoate

C

Hell-Volhard-Zelinsky reaction, 2-chloro-ethanoic acid

D

Riemer-Tiemann reaction, 1-chloro-ethanoic acid

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

The Crystal Field Stabilisation energy of (i) $\left[\mathrm{CoF}_6\right]^{3-}$ and (ii) $\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$ are ⋯and ⋯⋯ respectively.

A

(i) $-2.8 \Delta_0$         (ii) $-2.4 \Delta_0$

B

(i) $2.8 \Delta_0$        (ii) $2.4 \Delta_0$

C
(i) $-0.6 \Delta_0$        (ii) $0.4 \Delta_0$
D
(i) $-0.4 \Delta_0$         ii) $0 \Delta_0$
3
COMEDK 2026 Morning Shift
MCQ (Single Correct Answer)
+1
-0

Identify the correct statement

A

A hypotonic solution is more concentrated with respect to the other solution separated from it by a semi permeable membrane

B

At the freezing point of a solution containing a non-volatile solute, the vapour pressure of the liquid solvent becomes less than that of the solid solvent

C

In case of dissociation of solute particles in a solution, the van't Hoff factor is more than unity because the observed molar mass has a lesser value

D

The molal boiling point elevation constant for a solvent is directly proportional to its enthalpy of vaporisation

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

0.02 M solution of sucrose is isotonic with 0.008 M solution of sodium sulphate. What is the percentage dissociation of the electrolyte?

A

75

B

79

C

85

D

88