CBSE Class 12 Chemistry Polymers Assignment

Read and download free pdf of CBSE Class 12 Chemistry Polymers Assignment. Get printable school Assignments for Class 12 Chemistry. Class 12 students should practise questions and answers given here for Unit 15 Polymers Chemistry in Class 12 which will help them to strengthen their understanding of all important topics. Students should also download free pdf of Printable Worksheets for Class 12 Chemistry prepared as per the latest books and syllabus issued by NCERT, CBSE, KVS and do problems daily to score better marks in tests and examinations

Assignment for Class 12 Chemistry Unit 15 Polymers

Class 12 Chemistry students should refer to the following printable assignment in Pdf for Unit 15 Polymers in Class 12. This test paper with questions and answers for Class 12 Chemistry will be very useful for exams and help you to score good marks

Unit 15 Polymers Class 12 Chemistry Assignment

COAL, PETROLEUM AND POLYMERS

Question. When formaldehyde is heated with phenol in the presence of an alkali, the product formed is -
(A) rubber
(B) bakelite
(C) chloroprene
(D) neoprene
Answer. B

Question. Synthetic fibres are obtained from -
(A) plants
(B) animals
(C) petroleum
(D) minerals
Answer. C

Question. The monomer of Buna-S are -
(A) styrene and butadiene
(B) isoprene and butadiene
(C) vinyl chloride and sulphur
(D) butadiene.
Answer. A

Question. Which of the following substances is used in refining of petroleum ?
(A) NaCl
(B) NaOH
(C) Na2CO3
(D) NaHCO3
Answer. B

Question. Which of the following is used as an anti - knocking compound ?
(A) TEL
(B) C2H5OH
(C) Glyoxal
(D) Freon
Answer. A

Question. Separation of fractions of petroleum is done by-
(A) simple distillation
(B) destructive distillation
(C) fractional distillation
(D) sedimentation
Answer. C

Question. Out of the different types of fuels the one which is excellent is :
(A) the solid fuel
(B) the liquid fuel
(C) the gaseous fuel
(D) none of these
Answer. C

Question. When a well is drilled through the rock, ________ comes out first.
(A) petroleum
(B) natural gas
(C) crude oil
(D) residual oil
Answer. B

Question. Which of the following is correct ?
(A) LPG is liquefied isobutane
(B) LPG is liquefied methane
(C) LPG is liquefied methane and propane
(D) LPG is mixture of methane and ethane
Answer. A

Question. While leakage in L.P.G. gas cylinders which gas gives fowl smell -
(A) butane
(B) propane
(C) methane
(D) ethyl mercaptan
Answer. D

Question. Which of the following names represents the foul smelling, black, thick, viscous liquid obtained from destructive distillation of coal ?
(A) Coke
(B) Coal tar
(C) Coal gas
(D) None of these
Answer. B

Question. Kerosene is a mixture of -
(A) alkanes
(B) aromatic compounds
(C) alcohols
(D) aliphatic acid
Answer. A

Question. The petroleum product that has replaced coal-tar for metalling the road is :
(A) peat
(B) bitumen
(C) lignite
(D) anthracite
Answer. B

Question. Coal is a fossil fuel and it cannot be prepared in a laboratory or industry because the formation of coal.
a. is very slow process.
b. needs very low pressure and low temperature.
c. needs very high pressure and high temperature.
d. causes air pollution.
Select the correct alternative.
(A) a and b
(B) b and d
(C) c and a
(D) d and c
Answer. C

Question. Which of the following products obtained by destructive distillation of coal is not properly matched ?
(A) Coal tar - Dyes, explosives, paints.
(B) Coal gas - Fuel.
(C) Coke - Drinking purposes.
(D) Ammoniacal liquor - Fertilizers.
Answer. C

Question. Natural rubber is heated with an element X to make it hard , strong and more elastic . X is :
(A) zinc
(B) sulphur
(C) lead
(D) H2
Answer. B

Question. Which of the following are linear polymers ?
(A) Cellulose
(B) Natural Rubber
(C) Both (A) & (B)
(D) None of these
Answer. C

19. The structure of isoprene is :-
(A) CH2= C (C2H5) – CH = CH2
(B) CH2= C (OCOCH3) – CH = CH2
(C) CH2= C (CH3) – CH = CH2
(D) CH2 = CH – C Ξ CH
Answer. C

Question. Correct order of products in which they are extracted from crude oil in fractional distillation column from top to bottom is -
(A) Natural gas , Petrol , Diesel , Paraffin
(B) Natural gas , Diesel , Petrol , Paraffin
(C) Natural gas , Parafin , Diesel , Petrol
(D) Parafin , Natural gas , Petrol , Diesel
Answer. A

Question. Main constituents of coal gas are -
(A) H2O, C2H6, O2
(B) CH4, CO2, O2
(C) CH4, H2, CO
(D) C2H6, N2, O2
Answer. C

Question. Producer gas is a mixture of :
(A) CO and H2
(B) CO and N2
(C) Co and H2
(D) none of these
Answer. B

Question. The head of a safety match contains
(A) antimony trisulphide and potassium chlorate.
(B) antimony chloride and potassium sulphide.
(C) antimony carbonate.
(D) potassium sulphide.
Answer. A

Question. Pick out the incorrect statement amongst the following
(A) Nylon clothing can stand high temperature and are therefore good to wear in summers.
(B) Thermosetting plastics do not become soft on heating.
(C) Addition polymers are formed without the elimination of by- product molecules.
(D) Natural rubber is obtained as latex from rubber trees.
Answer. A

Question. Rubber is heated with sulphur and the process is known as -
(A) galvanization
(B) vulcanization
(C) bessemerization
(D) sulphonation
Answer. B

Question. Thermoplastics are -
(A) linear polymers.
(B) soften or melt on heating.
(C) molten polymer can be moulded in desired shape.
(D) All of these
Answer. D

Question. Which of the following acids is used in preparation of Nylon -66 ?
(A) Acetic acid
(B) Ascorbic acid
(C) Adipic acid
(D) Amino acid
Answer. C

Question. Natural rubber is a polymer of -
(A) butadiene
(B) ethene
(C) styrene
(D) isoprene
Answer. D

Question. Match the terms of column A correctly with the phrases given in column B.
Column-A               Column-B
(i) Polyester         (a) Prepared by using wood pulp
(ii) Teflon             (b) Used for making parachutes and stockings
(iii) Rayon            (c) Electrical switches
(iv) Nylon            (d) Fabrics do not wrinkle easily
(v) Bakelite          (e) Fire - resistant clothes
(vi) Melamine       (f) Used to make non-stick cookwares
(A) (i) (d), (ii) (f), (iii) (a), (iv) (b), (v) (c), (vi) (e).
(B) (i) (f), (ii) (d), (iii) (a), (iv) (b), (v) (c), (vi) (e).
(C) (i) (d), (ii) (f), (iii) (b), (iv) (a), (v) (c), (vi) (e).
(D) (i) (a), (ii) (f), (iii) (d), (iv) (b), (v) (c), (vi) (e).
Answer. A

Question. Match the column A and B
Column A                                 Column B
i. Thermoplastics                    a. Handles of  utensils, floor tiles
ii. Thermosetting plastics         b. Melamine
iii. Biodegradable                    c. Teflon
iv. Fire proof plastic                d. Wood
v. Oil and water do not stick.   e.Combs,containers
(A) i-d, ii-e, iii-a, iv-b, v-c
(B) i-e, ii-a, iii-d, iv-b, v-c
(C) i-a, ii-d, iii-b, iv-c, v-e
(D i-c, ii-b, iii-a, iv-e, v-d
Answer. B

Question. Condensation polymer among the following is -
(A) teflon
(B) polystyrene
(C) PVC
(D) dacron
Answer. D

Question. Which of the following is not an example of synthetic fibre ?
(A) Rayon
(B) Nylon
(C) Polyacrylonitrile
(D) Fullerene
Answer. D

Question. Buna–S is -
(A) artificial fibre
(B) plastic
(C) synthetic rubber
(D) synthetic detergent
Answer. C

Question. Fuel which contains 90 % methane is -
(A) oil gas
(B) Biogas
(C) liquefied petroleum gas
(D) natural gas
Answer. D

Question. Formula of Freon-11 is - 
(A) CCl3 F
(B) CCl2 F2
(C) Cl3C–CCl2 F
(D) CCl2F CCl2F
Answer. A

Question. The Freon containing two carbon atoms, two fluorine atoms and four chlorine atoms is -
(A) Freon- 112
(B) Freon- 114
(C) Freon- 113
(D) Freon- 111
Answer. A

Question. Method used for purifying petroleum is -
(A) simple distillation
(B) steam distillation
(C) vacuum distillation
(D) fractional distillation
Answer. D

Question. Among the following compounds which one is used for cooling refrigerator ?
(A) NH4 Cl
(B) CO
(C) NH4OH
(D) Liquid NH3
Answer. D

Question. In the process of vulcanization -
(A) natural rubber is heated with sulphur
(B) natural rubber is heated with carbon
(C) natural rubber is heated with phosphorus
(D) natural rubber is heated with sodium
Answer. A

Question. Which gas will probably be important energy source for future ? 
(A) Methane
(B) Natural Gas
(C) Dihydrogen
(D) Nitrogen
Answer. B

Question. Which is the important constituent (95%) of natural gas ? 
(A) Methane
(B) Propane
(C) Ethane
(D) Chlorine
Answer. A

Question. Which of the following is thermoresistant polymer ? 
(A) Orlon
(B) Polythene
(C) Teflon
(D) Bakelite
Answer. D

Question. Which of the following is known as Freon ?
(A) CCl2F2
(B) CHCl3
(C) CH2F2
(D) CF4
Answer. A


Level-1:Questions
 
Question. What are polymers?
Answer. These are referred to as Macromolecules which are formed by joining of repeating structural units on a large scale.
 
Question. Give two examples each of natural and of synthetic polymers.
Answer.  Natural polymers e.g.:- proteins, starch
Synthetic polymers e.g.:- Polythene, Nylon-6,6
 
Question. What are biodegradeable polymers? Give one example.
Answer.  Polymers which are degraded easily by environmental processes.
e.g.: PHBV
 
Question. How are the polymer classified on the basis of structure?
Answer.  They are three types based on the structure of polymers
a) Linear polymers
b) branched polymers
c) cross linked polymers.
 
Question. Define the term ‘polymerisation’.
Answer. The process of making polymer from monomers.
 
Question. What are the monomers for the following polymers:
i) Polythene
ii) PVC
iii) Teflon
iv) Polystyrene
Answer. i) Ethene
ii) Vinyl chloride
iii) Tetrafluoroethene
iv)Styrene
 
Question. In which classes, the polymers are classified on the basis of molecular forces?
Answer.Elastomers, Fibres, thermoplastic and thermosetting polymers
 
Question.Give an example of elastomer.
Answer.  Neoprene
 
Question. Identify the polymer.
-A-A-A-A-AA:
Answer.Homopolymer
 
Question. Define the term ” homopolymerisation”.
Answer.The process of making polymer by adding one kind of monomers
 
Question. Identify the polymer.
Answer. -A-B-A-B-A-B-A-BA:
Copolymer
 
Question. why rubbers are called “Elastomers”?
Answer.They can be stretched and retract to its original position after the release of force.
 
Question. Differentiate between Thermoplastic and Thermosetting polymers.
Answer.
Thermoplastic polymers:-They can be reshaped again and again. Thermosetting polymers:-Once it is moulded and it cannot be remelted and reused

Question. Is (-NH-CHR-Co-)n is a homopolymer or copolymer?
Answer.
It is a homopolymer.

Question. What is vulcanized rubber?
Answer.
 Adding sulphur to rubber to make it hard called ‘↑ulcanised rubber’

Question. How can natural rubber be made more tough?
Answer. 
By adding Sulphur.

Question. What are natural polymers?
Answer.
 Polymers mostly found in plants and animals.

Question. What are synthetic polymers?
Answer. 
Man made polymers.

Question. What are polyamides and polyesters? Give one example of each.
Answer. 
Polyamides are polymers made with amide linkages and polyesters are polymers made with ester linkages

Question. Classify the following as homopolymers and copolymers: Polythene, PVC, PTFE, Buna-S, polystyrene, Buna-N
Answer. 
Homopolymers:- Polythene, PTFE, Polystyrene Copolymers:- Buna-S and Buna-N
 

Please click the link below to download CBSE Class 12 Chemistry Polymers Assignment
Unit 12 Aldehydes, Ketones and Carboxylic Acids
CBSE Class 12 Chemistry Aldehydes Ketons Carboxylic Acids Questions

More Study Material

CBSE Class 12 Chemistry Unit 15 Polymers Assignment

We hope you liked the above assignment for Unit 15 Polymers which has been designed as per the latest syllabus for Class 12 Chemistry released by CBSE. Students of Class 12 should download and practice the above Assignments for Class 12 Chemistry regularly. We have provided all types of questions like MCQs, short answer questions, objective questions and long answer questions in the Class 12 Chemistry practice sheet in Pdf. All questions have been designed for Chemistry by looking into the pattern of problems asked in previous year examinations. 

Assignment for Chemistry CBSE Class 12 Unit 15 Polymers

Our team of expert teachers have referred to NCERT book for Class 12 Chemistry to design the Chemistry Class 12 Assignments. If you practice at least one test paper daily, you will get higher marks in Class 12 exams this year. Daily practice of Chemistry course notes and related study material will help you to clear all your doubts and have stronger understanding of all concepts. You can download all Revision notes for Class 12 Chemistry also from www.studiestoday.com absolutely free of cost.

Unit 15 Polymers Assignment Chemistry CBSE Class 12

All questions and their answers for the assignment given above for Class 12 Chemistry have been developed as per the latest curriculum and books issued for the current academic year. The students of Class 12 can rest assured that the best teachers have designed the questions of Chemistry so that you are able to revise the entire syllabus if you do the assignments. Lot of MCQ questions for Class 12 Chemistry have also been given in the worksheets and assignments for regular use. All study material for Class 12 Chemistry students have been given on studiestoday.

Unit 15 Polymers Assignment CBSE Class 12 Chemistry

Regular assignment practice helps to get a more comprehensive understanding of Unit 15 Polymers concepts. Assignments play a crucial role in understanding Unit 15 Polymers in CBSE Class 12. Students can download all the assignments of the same chapter in Class 12 Chemistry in Pdf format. You can print them or read them online on your computer or mobile.

CBSE Chemistry Class 12 Unit 15 Polymers Assignment

CBSE Class 12 Chemistry latest books have been used for coming up with the latest questions and solutions for the above assignment. If you have revised all concepts relating to Unit 15 Polymers then you should attempt all questions given in the test sheets above. We have also provided lot of Worksheets for Class 12 Chemistry which you can use to further make your self stronger in Chemistry

Where can I download in PDF assignments for CBSE Class 12 Chemistry Unit 15 Polymers

You can download free Pdf assignments for CBSE Class 12 Chemistry Unit 15 Polymers from StudiesToday.com

The assignments for Unit 15 Polymers Class 12 Chemistry for have been made based on which syllabus

The Unit 15 Polymers Class 12 Chemistry Assignments have been designed based on latest CBSE syllabus for Class 12 Chemistry issued for the current academic year

Can I download and print these printable assignments for Chemistry Unit 15 Polymers Class 12

Yes, These printable assignments for Unit 15 Polymers Class 12 Chemistry are free to download and print

How many topics are covered in Unit 15 Polymers Chemistry assignments for Class 12

All topics given in Unit 15 Polymers Chemistry Class 12 Book for the current academic year have been covered in the given assignment

Is there any charge for this assignment for Unit 15 Polymers Chemistry Class 12

No, all Printable Assignments for Unit 15 Polymers Class 12 Chemistry have been given for free and can be downloaded in Pdf format

How can I download the printable test assignments for Unit 15 Polymers Chemistry Class 12

Just click on the View or Download button below, then another window with the Pdf will be visible, just click on the Pdf icon to download the free assignments for Unit 15 Polymers Class 12 Chemistry

Are these assignments available for all chapters in Class 12 Chemistry

Yes, apart from Chemistry you can download free assignments for all subjects in Class 12

Can I download solved assignments for Unit 15 Polymers CBSE Class 12 Chemistry

Our team of expert teachers at studiestoday.com have provided all answers for the practice questions which have been given in Class 12 Chemistry Unit 15 Polymers assignments