Class 11 Half Yearly Question Papers Chemistry. We covered all the Class 11 Half Yearly Question Papers Chemistry MCQs in this post for free so that you can practice well for the exam.
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Class 11 Half Yearly Objective Question Papers Chemistry for Students
Biodegradable polymers are used in:
(A) Drug release materials
(B) Implants
(C) Orthopedic devices
(D) All of the above (A, B, and C)
Option d – All of the above (A, B, and C)
Buna-N polymer is obtained by reacting But-1,3 diene and:
(A) Vinyl cyanide
(B) Vinyl chloride
(C) Vinyl alcohol
(D) Vinyl bromide
Option a – Vinyl cyanide
A three-dimensional cross-linked network solid having links at two ortho and one para position is called:
(A) Bakelite
(B) Orlon
(C) PVC
(D) PAN
Option a – Bakelite
The reaction of Melamine + Methanal to form Melamine formaldehyde resin is an example of:
(A) Addition-elimination polymerization
(B) Condensation polymerization
(C) Elimination polymerization
(D) Rearrangement polymerization
Option b – Condensation polymerization
Buna-S is a polymer of:
(A) Styrene and methanal
(B) Styrene and but-1,2-diene
(C) Styrene and but-1,3-diene
(D) But-1,3-diene and vinyl cyanide
Option c – Styrene and but-1,3-diene
Cellulose pulp wood is treated with conc. NaOH to give:
(A) Alkali cellulose
(B) Cellulose xanthate
(C) Viscose rayon
(D) Acetate rayon
Option a – Alkali cellulose
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