CBSE Class 12 Chemistry Polymers (2). CBSE issues sample papers every year for students for class 12 board exams. Students should solve the CBSE issued sample papers to understand the pattern of the question paper which will come in class 12 board exams this year. The sample papers have been provided with marking scheme. It’s always recommended to practice as many CBSE sample papers as possible before the board examinations. Sample papers should be always practiced in examination condition at home or school and the student should show the answers to teachers for checking or compare with the answers provided. Students can download the sample papers in pdf format free and score better marks in examinations. Refer to other links too for latest sample papers. 

Q1.Give the name and structure of reagent usedfor initiating a free radicalchainreaction .

Ans: Name- benzoylperoxide ,C₆H₅-CO-O-O-CO-H₅C₆

Q2.Classify them as addition and condensation polymers:Nylon-66,Buna-s,polythene,terylene 

Ans:Additionpolymer:Polythene and Buna-s,Condensationpolymer:Nylon-66,terylene

Q3.Give name and structure of monomer present in natural rubber.

Ans:Name:Isoprene(2-Methyl1,3-Butadiene),Structure:CH₂=C(CH₃)CH=CH₂

Q4.What is biodegradeablepolymers?Give one example

Ans:PHBV

Q5.What is polymers?

Ans:Polymers are high molecularmass substances consisting of large no of repeating structural units.

Q6.How are the polymer classified on the basis of structure:

Ans:a) Linear Polymer b)Branched chain polymers c)Cross linked polymers

Q7Writes the names of monomer of the following (-CO-(CH₂)₅-NH-)n

Ans:Caprolactum

Q8.Arrange the following polymers in increasing order of their intermolecular forces: Nylon6,Neoprene,polyvinyl chloride.

Ans:Neoprene<Polyvinyl chloride<Nylon-6

Q9.Is (-NH-CHR-Co-)_n is a homopolymer or copolymer?

Ans: Homopolymer

Q10.What is vulcanized rubber?

Ans:process of heating a mixture of natural rubber with sulphur is called vulcanized rubber.

Q11.Write the monomer of Bakelite.

Ans: Phenol and formaldehyde

Q12.Menton two uses of Bakelite.

Ans: It is used for making combs,electrical switches and handle of various utensils

Q13Explain the term copolymer and give two examples.

Ans:Polymer which are made up of two different monomer unit are called copolymers: eg.Buna-N,Buna-S

Q14.Mention one use of melamine?

Ans: It is used in the manufacture of unbreakable crockery.

Q15.How can natural rubber be made more tough?

Ans: By the process of vulcanization with sulphur.

Q16.What is natural rubber?

Ans: It is a cis 1,4-polyisoprene. 

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