CBSE Class 12 Chemistry Polymers Worksheet Set A

Question. Triethyl aluminium titanium chloride used in plastic industry is a:
a. Vulcaniser
b. Plasticiser
c. Ziegler-Natta catalyst
d. Telomer
Answer : C

Question. Synthetic fibres like nylon-66 are very strong because:
a. They have high molecular weights and high melting points
b. They have a high degree of cross-linking by strong C–C bond
c. They have linear molecules consisting of very long chains
d. They have linear molecules interlinked with forces like hydrogen bonding
Answer : D

Question. Which one of the following in used to make 'non-stick' cookware?
a. PVC
b. Polystyrene
c. Polyethylene terephthalate
d. Polytetrafluoroethylene
Answer : D

Question. Which is not a polymer?
a. Ice
b. Starch
c. Protein
d. Cellulose
Answer : A

Question. Which of the following is synthetic rubber?
a. Buna-S
b. Neoprene
c. Teflon
d. Terylene
Answer : A, B

Question. Natural rubber is basically a polymer of or The monomer of natural polymer rubber is:
a. Neoprene
b. Isoprene
c. Chloroprene
d. Butadiene
Answer : B

Question. What is not true about polymers?
a. Polymers do not carry any charge
b. Polymers have high viscosity
c. Polymers scatter light
d. Polymers have low molecular weight
Answer : D

Question. The catalyst used in the manufacture of polyethene by Ziegler method:
a. Triphenyl aluminium
b. Titanium tetrachloride
c. Trimethyl aluminium
d. Titanium isopropoxide
Answer : B, C

Question. Acrylic resins are:
a. Colourless
b. Dark brown
c. Thermoplastic
d. Transparent
Answer : A, D

Question. The monomer of the polymer

Answer : A

Question. Which one is classified as a condensation polymer?
a. Teflon
b. Acrylonitrile
c. Dacron
d. Neoprene
Answer : C

Question. Which of the following polymers can be made by free radical addition polymerisation mechanism?
a. PE
b. HDPE
c. LDPE
d. Telflon
Answer : A, B, C

Question. Terylene is the polymer of:
a. Ethylene glycol
b. Terephthalic acid
c. Vinyl chloride
d. Hexamethylene diamine
Answer : A, B

Question. Ethylene-propylene rubber (EPR) are:
a. Stereoregular
b. Saturated
c. Unsaturated
d. Syndiotactic
Answer : A, B

Question. Which of the following polymers can be made by condensation polymerisation reaction?
a. Dacron
b. Nylon-6,6
c. Bakelite
d. PE
Answer : A, B, C

Question. Which of the following polymer has ester linkage?
a. Nylon-66
b. PVC
c. Terylene
d. SBR
Answer : C

Question. Neoprene, a synthetic rubber contains which of the following element besides C and H:
a. N
b. O
c. Cl
d. F
Answer : C

Question. Which one among the following is a thermosetting plastic?
a. PVC
b. PVA
c. Bakelite
d. Perspex
Answer : C

Question. Nylon-5,10 can be prepared by:
a. H₂N(CH₂)₅NH₂ + Decanoic acid (Sebacle acid)
b. HOOC(CH₂)COOH + H₂N(CH₂)₁₀ NH₂
c. H₂N(CH₂)₆ NH₂ + HOOC(CH₂)₈ COOH
d. H₂N(CH₂)₁₀ NH₂ + HOOC(CH₂)₄ COOH
Answer : A

Question. Nylone 66 is:
a. Polyamide
b. Polyester
c. Polystyrene
d. Polyvinyl
Answer : A

Question. A condensation polymer among the following polymers is:
a. PVC
b. Teflon
c. Decron
d. Polystyrene
Answer : C

Question. Teflon is a polymer of:
a. Tetrafluoro ethane
b. Tetrafluro propene
c. Difluorodichloro ethane
d. Difluoro ethene
Answer : A

Question. Which of the following polymers contain 1,3-butadiene as one of the monomers?
a. Butyl rubber
b. Nitrile rubber
c. ABS plastic
d. SBR
Answer : ALL

Question. The method of choice for determining the molecular weight of a polymer is:
a. Osmotic pressure
b. Gas density
c. Lowering of freezing point
d. Direct weighing of a single molecule
Answer : A

Question. In the process of forming ‘mercerised cellulose’ the swelling of cellulose is caused by:
a. Water
b. Na₂CO₃
c. Aq. NaOH
d. Aq. HCl
Answer : C

Question. The catalyst used for the polymerisation of olefins is:
a. Ziegler Natta catalyst
b. Wilkinson’s catalyst
c. Pd-catalyst
d. Zeise’s salt catalyst
Answer : A

Question. The monomers used in the production of nylon-66 are:
a. Hexamethylene diamine and ethylene glycol
b. Adipic acid and ethylene glycol
c. Adipic acid and hexamethylene diamine
d. Dimethyl terephthalate and ethylene glycol
Answer : C

Question. Acetate rayon is prepared from:
a. Acetic acid
b. Glycerol
c. Starch
d. Cellulose
Answer : D

Question. The value of n in the formula (C₅H₁₀O₅)  (C₅H₁₀O₅)_n for inulin is about:
a. 30
b. 300
c. 3000
d. 300000
Answer : A

Question. The mass average molecular mass and number average molecular mass of a polymer are respectively 40,000 and 30,000. The polydispersity index of polymer will be:
a. < 1
b. > 1
c. 1
d. 0
Answer : B

Question. The plastics if are hard, become soft and readily workable by addition of certain compounds called:
a. Catalysts
b. Telomers
c. Plasticisers
d. Vulcaniser
Answer : C

Assertion and Reason

Note: Read the Assertion (A) and Reason (R) carefully to mark the correct option out of the options given below:
a. If both assertion and reason are true and the reason is the correct explanation of the assertion.
b. If both assertion and reason are true but reason is not the correct explanation of the assertion.
c. If assertion is true but reason is false.
d. If the assertion and reason both are false.
e. If assertion is false but reason is true.

Question. Assertion: Hydrogenation is the process of converting an oil into a fat, called vegetable ghee.
Reason: Hydrogenation as carried out in presence of a catalyst usually finely divided nickel.
Answer : B

Question. Assertion: Teflon has high thermal stability and chemical inertness.
Reason: Teflon is a thermoplastic.
Answer : B

Question. Assertion: Bakelite is a thermosetting polymer.
Reason: Bakelite can be melted again and again without any change.
Answer : C

Question. Assertion: In vulcanisation of rubber, sulphur cross links are introduced.
Reason: Vulcanisation is a free radical initiated chain reaction.
Answer : B

Question. Assertion: The time of vulcanisation and temperature is increased by adding accelerators.
Reason: By vulcanising, a material of high tensile strength can be obtained.
Answer : C

Comprehension Based

Paragraph –I

Read the paragraph and answer the given questions

A. C is an rotten smell gas.
B. E is called lithophone used as white paint.
C. G is a colourless gas having acidic nature.
D. D is in soluble in HCl.

Question. When G reacts with aqueous NaOH, product formed is;
a. Na₂CO₃
b. Na₂SO₃
c. Na₂SO₄
d. NaNO₃
Answer : B

Question. When compound F heated with cobalt nitrate, it gives
a. CoCuO₂
b. CoO⋅CuO
c. CoZnO₂
d. CoFeO₂
Answer : C

Question. Compound A is:
a. HgSO₄ ⋅ 2H₂O
b. ZnSO₄ ⋅ 7H₂O
c. ZnSO₄
d. FeSO₄⋅ 7H₂O
Answer : B

Paragraph -II

The process by which the monomers are converted into polymers is called polymerisation. Homopolymers and copolymers can exist in three different types of chain configurations i.e. linear, branched or cross–linked. When two different repeater units in a copolymer are distributed at random throughout the chain, the polymer is called a ‘random polymer’.

Question. The repeating units of PTFE are:
a. Cl₂ CH – CH₃
b. F₂C = CF₃
c. F₃C–CF₃
d. FClC = CF₂
Answer : B

Question. Which of the following represents the example of homopolymer?
a. PMMA
b. Bakelite
c. Glyptal
d. Nylon–66
Answer : A

Question.

a. PVC
b. PMMA
c. PAN
d. None of these
Answer : D

Match the Column

Question. Match the statement of Column with those in Column II:

Column I (Polymer)	Column II (Type)
(A) Poly (methyl methacrylate) PMMA	1. Thermosetting polymer
(B) Orlon	2. Thermoplastic polymer
(C) Bakelite	3. Addition polymer
(D) Decron	4. Condensation polymer

a. A→2, 3; B→3; C→1, 4; D→4
b. A→1, 3; B→3; C→2, 4; D→4
c. A→2, 4; B→1; C→2, 4; D→4
d. A→2, 3; B→1; C→3, 4; D→1
Answer : A

Question. Match the statement of Column with those in Column II:

Column I	Column II
(A) Pepsin	1. Genetic material
(B) Nucleic acid	2. Digestive enzyme
(C) Ascorbic acid	3. Antibiotic
(D) Testosterone	4. Sex hormone
	5. Vitamin

a. A→3, B→1, C→4, D→2
b. A→1, B→2, C→5, D→3
c. A→1, B→3, C→2, D→4
d. A→4, B→1, C→3, D→2
Answer : B

Question. Match the polymers in column-I with their main uses in column II and choose the correct answer:

Column I	Column II
(A) Polystyrene	1. Paints and lacquers
(B) Glyptal	2. Rain coats
(C) Polyvinyl chloride	3. Manufacture of toys
(D) Bakelite	4. Computer discs

a. A→2, B→1, C→3, D→4
b. A→3, B→1, C→2, D→4
c. A→2, B→4, C→3, D→1
d. A→3, B→4, C→2, D→1
Answer : B

Integer

Question. The mass average molecular mass and number average molecular mass of a polymer are respectively 40,000 and 30,000. The polydispersity index of polymer will be:
Answer : 1

Question. The value of n in the formula (C₅H₁₀O₅)n for inulin is about Specific rotations of α-anomer of given mono saccharide is + 112º and for β-anomer is +19º Specific rotation of equilibrium mixture is 52.7°. Calculate % composition of α and β anomers in the equilibrium mixture:
Answer : 30

Question. Calculate % composition of α anomers in the equilibrium mixture:
Answer : 36

Question. Calculate % composition of β anomers in the equilibrium mixture:
Answer : 64

Question. The total number of lone pairs of electrons in melamine is:
Answer : 6

 

 

Please click on below link to download CBSE Class 12 Chemistry Polymers Worksheet Set A