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Punjab (PTB) · Quarter book test · Free

2nd Year Chemistry 2nd Quarter Book Paper

40 marks · 1 hour · 28 questions. Covers: 5 chapters (CHAP 22: HYDROXY COMPOUNDS to CHAP 26: POLYMERS).

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2nd Year Chemistry 2nd Quarter Book Paper

2nd Year · Chemistry · Punjab (PTB)

Name: ____________Roll No: ________Class/Section: ________Date: ________Total marks: 40Time: 1 hour

Q1. Multiple choice questions (Attempt all · 12 × 1 = 12)

  1. What by-product is released during the alkylation of methanamine with bromoethane?

    1. H2O

    2. HBr

    3. HCI

    4. NH3

  2. During Fehling's test, Cu2+ ions are reduced to which state?

    1. Metallic copper

    2. Cu1+ ions

    3. Cu3+ ions

    4. Complex copper salt

  3. What was unique about the structure of the molecule picked out by the computer model?

    1. It was exactly identical to penicillin

    2. It lacked any functional groups or heteroatoms.

    3. It possessed a molecular structure different from existing antibiotics.

    4. It was an inorganic metal complex.

  4. Which one of the following does not represent an oxidation?

    1. Ethanal  ethanol

    2. Propan-1-ol propanal

    3. Propan-2-ol propanone

    4. Ethanol  ethanoic acid

  5. 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

  6. What type of compound is formed when a primary amine reacts with nitrous acid (HNO2)?

    1. Nitroamine

    2. Insoluble yellow oily liquid

    3. Aliphatic alcohol with nitrogen gas evolution

    4. Quaternary salt

  7. How is HCN gas typically produced during the reaction?

    1. Adding mineral acid to cyanide salt

    2. Oxidation of primary alcohols

    3. Distillation of pure ethanal

    4. Reduction of a ketone

  8. How is a "disconnection" best described?

    1. A physical explosion in a laboratory flask

    2. An imaginary breaking down of bonds on paper

    3. The purification of an unreactive liquid

    4. The separation of a mixture using chromatography

  9. When molten phenol reacts vigorously with sodium metal (Na), the products are:

    1. Sodium phenoxide and hydrogen gas (H2)

    2. Sodium phenoxide and water

    3. Bromophenol and sodium chloride

    4. Benzene and sodium oxide

  10. 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

  11. Caffeine in coffee and theobromine in chocolate are examples of:

    1. Inorganic salts

    2. Organic nitrogen compounds

    3. Synthetic polymers

    4. Simple hydrocarbons

  12. Which monocarboxylic acid uniquely gives a positive Tollens' test?

    1. Methanoic acid

    2. Ethanoic acid

    3. Propanoic acid

    4. Benzoic acid

Q2. Short questions (Attempt any 8 of 12 · 8 × 2 = 16)

  1. Write the balanced equation for the reaction of aniline with bromine water.

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

  3. What is a "Target Molecule" (TM)?

  4. Describe a test (a different one in each case) that you could use to distinguish between the following pair of compounds: CH2=CH-CH2-OH and CH3CH2CHO

  5. 4-methylaniline reacts with HNO2(aq) at 4oC to form compound P. Compound P reacts with NaOH. The product of this reaction is compound Q. Draw the structure of compound P and Q.

  6. Explain why glycine is the only standard amino acid that does not exhibit optical activity.

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

  8. What target organism was chosen to train the machine-learning algorithm to recognize antibacterial traits?

  9. What is the use of benzaldehyde and acetone?

  10. Define a tertiary (3o) alcohol

  11. How does a Zwitterion form internally within an amino acid molecule?

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

Q3. Long questions (Attempt any 3 of 4 · 3 × 4 = 12)

  1. Give a detailed account of importance of retrosynthesis in organic synthesis.

  2. Define carboxylic acids and explain their important physical properties.

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

  4. Explain the acidic and alkaline hydrolysis of alkanenitriles with balanced chemical equations.