JEE Main 2021 (Online) 16th March Evening Shift | JEE Main Year Wise Previous Years Questions - ExamSIDE.Com

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1

JEE Main 2021 (Online) 16th March Evening Shift

MCQ (Single Correct Answer)

+4

-1

Ammonolysis of Alkyl halides followed by the treatment with NaOH solution can be used to prepare primary, secondary and tertiary amines. The purpose of NaOH in the reaction is :

A

to remove acidic impurities

B

to remove basic impurities

C

to activate NH₃ used in the reaction

D

to increase the reactivity of alkyl halide

2

JEE Main 2021 (Online) 16th March Evening Shift

MCQ (Single Correct Answer)

+4

-1

The secondary structure of protein is stabilised by:

A

Hydrogen bonding

B

glycosidic bond

C

Peptide bond

D

van der Waals forces

3

JEE Main 2021 (Online) 16th March Evening Shift

MCQ (Single Correct Answer)

+4

-1

Out of Syllabus

Which of the following polymer is used in the manufacture of wood laminates?

A

Melamine formaldehyde resin

B

Urea formaldehyde resin

C

cis-poly isoprene

D

Phenol and formaldehyde resin

4

JEE Main 2021 (Online) 16th March Evening Shift

MCQ (Single Correct Answer)

+4

-1

Fex₂ and Fey₃ are known when x and y are :

A

x = F, Cl, Br, I and y = F, Cl, Br, I

B

x = F, Cl, Br and y = F, Cl, Br, I

C

x = F, Cl, Br, I and y = F, Cl, Br

D

x = Cl, Br, I and y = F, Cl, Br, I

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