CBSE Class 12 Chemistry Polymers 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