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

The reagent used in carbylamine reaction is $\_\_\_\_$ and the product of the reaction will be $\_\_\_\_$

A

Alcoholic $\mathrm{KOH}+\mathrm{CHCl}_3$; isocyanide

B

Benzene sulphonyl chloride ; sulphonamide

C

Alcoholic $\mathrm{KOH}+\mathrm{CHCl}_3$; cyanide

D

Concentrated $\mathrm{HCl}+\mathrm{NaNO}_2$; diazonium salt

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

Two statements, Assertion and Reason are given. With reference to them, choose the correct option.

Assertion: Hydrolysis of 2-Bromo-2-methylpropane follows $S_N 1$ mechanism which involves 2 steps and the first step is:

COMEDK 2026 Morning Shift Chemistry - Haloalkanes and Haloarenes Question 2 English

Reason: The energy required to cleave $\mathrm{C}-\mathrm{Br}$ is taken from the energy released due to Inductive effect and hyper-conjugative effect.

A

Assertion is correct but Reason is wrong

B

Reason is correct but Assertion is wrong

C

Both Assertion and Reason are correct but Reason is not the correct explanation of Assertion

D

Both Assertion and Reason are correct and Reason is the correct explanation of Assertion

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

The heat of combustion of carbon to $\mathrm{CO}_2$ is $-393.5 \mathrm{~kJ} \mathrm{~mol}^{-1}$.

The heat released on the formation of 35.2 g of $\mathrm{CO}_2$ by combustion of C is:

A

+215 kJ

B

-315 kJ

C

-325 kJ

D

+620 kJ

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

Which among the following is an INCORRECT statement?

A

In D (+) Glucose, D represents the configuration similar to D-Glyceraldehyde

B

In monosaccharides, aldoses are reducing sugars while ketoses are non-reducing sugars

C

Polysaccharides are known as non-sugars as they are not sweet in taste

D

D (-) fructose forma a five membered ring known as furanose which is in analogy with the compound furan