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Class 10 Chemistry Chapter 26 Polymers Test 3 PDF | Punjab Board 2027 Model Papers
Polymers Grade 10 Chapter 26 Test 3
Class 10 Chemistry Chapter 26: Polymers – Class Test 3 is part of the Punjab Board 2027 Model Papers prepared according to the new syllabus issued by PECTAA Punjab. This chapter-wise test is designed to help Class 10 students revise the important concepts of Polymers and prepare effectively for their Chemistry examinations. Students can use this Class 10 Chemistry Chapter 26 test for practice, self-assessment, and exam preparation. Explore the complete Chapter Wise Test Series and Full Unit Model Paper to strengthen your preparation for the Punjab Board examinations.
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Chapter: 26
Total Time: 35 min
Chapter Wise Class Test
(Test # 3)
Chemistry
Total Marks: 25
ABCD
1ABCD
2ABCD
3ABCD
ABCD
4ABCD
5ABCD
6ABCD
ABCD
7ABCD
8ABCD
NOTE: Four possible answers A, B, C and D to each question are given. The choice which you think is correct, fill that circle in front of that question with Marker or Pen ink. Cutting or filling two or more circles will result in zero mark in that question.
Q.1:(08)
1.Which of the following polymer is a synthetic polymer:
(A) Starch(B) Cellulose(C) Animal fat(D) Polyester
Answer: (D) Polyester
2.Polymers or macromolecules are extremely large molecules formed by linking together:
(A) Large molecules(B) Monomers(C) Atoms of carbon only(D) Metal ions
Answer: (B) Monomers
3.Which polymer has an amide linkage:
(A) Polyester(B) Polyamide(C) Polyethene(D) Polystyrene
Answer: (B) Polyamide
4.PET (Polyethylene Terephthalate) is formed by reaction of ethane diol with:
(A) Butanedioic acid(B) Terephthalic acid(C) Amino acids(D) Glucose
Answer: (B) Terephthalic acid
5.Identify an ester linkage:
(A)
(B)
(C)
(D)
Answer: (A) R–CO–O–R (ester linkage: carbonyl carbon bonded to an oxygen that is bonded to R).
6.A polyamide is formed when butanedioic acid reacts with:
(A) A diol(B) A diamine(C) An alcohol(D) Water
Answer: (B) A diamine
7.The monomer of polyethene -[-CH2-CH2-]-? is:
(A) CH3 -CH3(B) CH2 = CH2(C) CH4(D) CH3-CH2-CH3
Answer: (B) CH2=CH2 (ethene)
8.The repeat unit of polyethene is:
(A) CH2 = CH2(B) -[-CH2-CH2-]-(C) CH3-CH3(D) CH2-O
Answer: (B) -[-CH2-CH2-]-
Chemistry • Chapter-26 • Chapter Wise Class Test (Test # 3) • Objective
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(PART – I)
Q.2 Write short answers to following questions.(6×2=12)
i.
Give two examples each of addition polymers and condensation polymers.
Addition polymers: polyethene (polythene), polypropylene (also PVC, polystyrene). Condensation polymers: nylon-6,6 (polyamide), PET (polyester).
ii.
Give examples of naturally occurring and man-made polymers.
Natural: starch, cellulose, proteins, DNA, natural rubber. Man-made: polyethene, nylon, polyester (PET), PVC, bakelite.
iii.
How polymers are useful for us?
Polymers are used for clothing, packaging, bottles, pipes, furniture, toys, insulation and medical items. They are light, cheap, strong, durable and easy to shape. Natural polymers (proteins, starch) are also essential for life and food.
iv.
How is PET formed?
PET (polyethylene terephthalate) is a condensation polymer formed when ethane-1,2-diol (ethylene glycol) reacts with terephthalic acid (a dicarboxylic acid). An ester linkage forms at each step and water is eliminated.
n HOOC–C6H4–COOH + n HO–CH2–CH2–OH → [–CO–C6H4–CO–O–CH2–CH2–O–]n + 2n H2O
v.
How synthetic fibers are different from natural fibers?
Synthetic fibres are man-made from petroleum chemicals (nylon, polyester, acrylic); they are stronger, more elastic, dry quickly and resist wrinkles and insects. Natural fibres come from plants or animals (cotton, wool, silk), absorb moisture better but are weaker and may be damaged by moths or mildew.
vi.
What is a repeat unit in polymerization?
The repeat unit is the smallest group of atoms that repeats again and again along the polymer chain. In polyethene it is –[–CH2–CH2–]–.
(PART – II)
Note: Attempt the following question.
Q.3: Describe the role of synthetic polymers in the textile industry.(5)
1. Synthetic fibres such as nylon, polyester (PET) and acrylic are produced from petrochemicals and spun into yarn for fabrics.
2. Nylon (a polyamide) is strong and elastic, so it is used for stockings, ropes, parachutes and carpets.
3. Polyester (PET) resists wrinkles and dries quickly; it is blended with cotton for shirts, bedsheets and curtains.
4. Acrylic is soft, light and warm like wool, so it is used for sweaters, blankets and artificial fur.
5. Synthetic fibres are cheaper, more durable and available in large quantity, reducing the need for cotton and wool, and they can be easily dyed and blended.
2. Nylon (a polyamide) is strong and elastic, so it is used for stockings, ropes, parachutes and carpets.
3. Polyester (PET) resists wrinkles and dries quickly; it is blended with cotton for shirts, bedsheets and curtains.
4. Acrylic is soft, light and warm like wool, so it is used for sweaters, blankets and artificial fur.
5. Synthetic fibres are cheaper, more durable and available in large quantity, reducing the need for cotton and wool, and they can be easily dyed and blended.
Chemistry • Chapter-26 • Chapter Wise Class Test (Test # 3) • Subjective
