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

Which of the following is an INCORRECT statement?

A

$\mathrm{CH}_3 \mathrm{OH}$ and $\mathrm{CH}_3 \mathrm{COCH}_3$ are separated by fractional distillation

B

In sodium nitroprusside test for Sulphur, the violet colour is due to formation of complex $\mathrm{Na}_4\left[\mathrm{Fe}(\mathrm{CN})_5 \mathrm{NOS}\right]$

C

$\mathrm{CH}_3 \mathrm{COO}^{-}, \mathrm{CN}^{-}, \mathrm{CH}_3 \mathrm{OH}, \mathrm{CH}_3-\mathrm{O}-\mathrm{CH}_3,\left(\mathrm{CH}_3\right)_3 \mathrm{~N}$ are nucleophiles

D

$\mathrm{AlCl}_3, \mathrm{NH}_3, \mathrm{SO}_3, \mathrm{NO}_2^{+}, \mathrm{H}_2 \mathrm{O}$ are electrophiles

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

$$ \begin{aligned} &\text { Using the data given below, the strongest reducing agent is: }\\ &\begin{array}{ll} \mathrm{E}_{\mathrm{Cr}_2 \mathrm{O}_7}^{\mathrm{o}}{ }^{2-} / \mathrm{Cr}^{3+}=1.33 \mathrm{~V} & \mathrm{E}_{\mathrm{MnO}_4^{-} / \mathrm{Mn}^{2+}}^{\mathrm{o}}=1.51 \mathrm{~V} \\ \mathrm{E}_{\mathrm{Cl}_2 / \mathrm{Cl}^{-}}^{\mathrm{O}}=1.36 \mathrm{~V} & \mathrm{E}_{\mathrm{Cr}^{3+} / \mathrm{Cr}}^{\mathrm{O}}=-0.74 \mathrm{~V} \end{array} \end{aligned} $$

A

$ Cr$

B

$\mathrm{Mn}^{2+}$

C

$\mathrm{Cr}^{3+}$

D

$\mathrm{Cl}^{-}$

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

$$ \text { The degree of the differential equation } \sqrt{1+\left(\frac{d y}{d x}\right)^{1 / 3}}=\frac{d^2 y}{d x^2} \text { is: } $$

A

6

B

3

C

1

D

2

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

If $f(x)=x^3+\frac{3}{2} x^2+3 x+3$, then $f(x)$ is

A

Even function

B

Decreasing function

C

Increasing function

D

Odd function