1
JEE Main 2026 (Online) 8th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which statements are True?

A. In Hoffmann bromamide degradation, 4 moles of NaOH and 2 moles of $\mathrm{Br}_2$ are consumed per mole of an amide

B. Hoffmann bromamide reaction is not given by alkyl amides.

C. Primary amines can be synthesized by Hoffmann bromamide degradation.

D. Secondary amide on reaction with $\mathrm{Br}_2$ and NaOH will give secondary amine.

E. The by-products of Hoffmann degradation are $\mathrm{Na}_2 \mathrm{CO}_3, \mathrm{NaBr}$ and $\mathrm{H}_2 \mathrm{O}$.

Choose the correct answer from the options given below :

A

A, C and E only

B

B, C and D only

C

C and E only

D

C, D and E only

2
JEE Main 2026 (Online) 8th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The incorrect statement from the following with respect to carbohydrates is :

A

All monosaccharides are reducing sugars.

B

The monosaccharide units obtained from hydrolysis of oligosaccharides are always the same.

C

Starch and cellulose are typical examples of polysaccharides, which are very high molecular weight compounds of more than ten monosaccharide units.

D

Open chain and cyclic structures co-exist at equilibrium that are responsible for certain properties as in the case of $\mathrm{D}-(+)$-glucose.

3
JEE Main 2026 (Online) 8th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which of the following amino acid will give violet coloured complex with neutral ferric chloride solution?

A

Threonine

B

Serine

C

Tyrosine

D

Cysteine

4
JEE Main 2026 (Online) 8th April Evening Shift
Numerical
+4
-1
Change Language

Number of paramagnetic complexes among the following is $\_\_\_\_$ .

$$ \begin{aligned} & {\left[\mathrm{MnBr}_4\right]^{2-},\left[\mathrm{NiCl}_4\right]^{2-},\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-},\left[\mathrm{Ni}(\mathrm{CO})_4\right],\left[\mathrm{CoF}_6\right]^{3-},\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-},\left[\mathrm{Mn}(\mathrm{CN})_6\right]^{3-},\left[\mathrm{Ti}(\mathrm{CN})_6\right]^{3-},} \\ & {\left[\mathrm{Cu}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+},\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}} \end{aligned} $$

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