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Punjab (PTB) · Chapter test · Free

2nd Year Chemistry Chapter 10 TestPOLYMERS

30 marks · 40 minutes · 21 questions. Covers: CHAP 26: POLYMERS.

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2nd Year Chemistry Chapter 10 Test

2nd Year · Chemistry · Punjab (PTB)

Name: ____________Roll No: ________Class/Section: ________Date: ________Total marks: 30Time: 40 minutes

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

  1. Polymers designed for blood vessels must exhibit high ........, while those for bones must exhibit high .......:

    1. Transparency, elasticity

    2. Flexibility, strength

    3. Hardness, transparency

    4. Solubility, density

  2. Which polymer combination is explicitly mentioned for making artificial blood vessel grafts?

    1. UHMWPE and PMMA

    2. Collagen and PLA

    3. Polyurethanes and Silicone

    4. PTFE and PET

  3. Photodegradable plastics absorb energy from sunlight in the form of:

    1. Infrared light

    2. UV light

    3. Visible green light

    4. X-rays

  4. Conventional polymers are an environmental nuisance primarily because they are:

    1. Soluble in water

    2. Non-degradable

    3. Highly toxic immediately upon contact

    4. Highly acidic

  5. What makes Nylon-6 more straightforward to mold compared to Nylon 6,6?

    1. Higher boiling point

    2. Lower melting point

    3. Highly explosive

    4. High rigidity

  6. What primary role do functional groups play in designing a synthesis strategy?

    1. They act as high-boiling inert solvents.

    2. They enable chemists to predict and control chemical reactions

    3. They prevent any possible side reactions from occurring

    4. They are strictly used to determine molecular weight

  7. An amide or peptide linkage consists of a carbonyl group (\[\text{C=O}\]) directly bonded to: 

    1. An oxygen atom

    2. A nitrogen atom with a hydrogen attached

    3. A halogen atom

    4. A carbon-carbon triple bond

  8. During retrosynthetic analysis, bond breaking (disconnection) is typically performed next to which structural feature?

    1. An aliphatic terminal hydrogen atom

    2. A functional group

    3. A quaternary carbon atom with no heteroatoms

    4. A stable aromatic ring junction bond

  9. Why is Nylon-6's polymerization atypical?

    1. It needs no heat

    2. No small molecule is removed during synthesis

    3. It occurs instantly

    4. It turns into gas

  10. What is the standard formula representing the dicarboxylic acid monomer?

    1. HN - R - NH

    2. HOOC - R - COOH

    3. R - CO - R

    4. R - OH

Q2. Short questions (Attempt any 6 of 8 · 6 × 2 = 12)

  1. For poly(chloroethene) (PVC): Name the monomer.

  2. What step must be performed on 4-aminophenol during paracetamol retrosynthesis before reaching phenol?

  3. Name a medical application designed using materials that break down when no longer needed.

  4. Why can photodegradable plastics not be used for long-term storage?

  5. What verified clinical property made Halicin an exceptional discovery?

  6. Which functional group group (C=O) is developed in polymer chains to enhance photosorption?

  7. Write down the final forward preparation step for paracetamol.

  8. Which is harder: Nylon 6,6 or Nylon 6?

Q3. Long questions (Attempt any 2 of 3 · 2 × 4 = 8)

  1. Assess the Paradigm Shift in Drug Discovery by Comparing Traditional Total Synthesis and Artificial Intelligence (AI) Pathways.

  2. Elaborate on the Concepts of the Disconnection Approach (Retrosynthesis) and Functional Group Interconversion (FGI).

  3. Discuss why Nylon-6 is classified as a condensation polymer despite the absence of small molecule elimination during its formation.