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Punjab (PTB) · Half book test (board pattern) · Free

10th Class Chemistry Second half Book Paper

60 marks · About 2 hours (objective and subjective) · 39 questions. Covers: 6 chapters (CHAP 21: ORGANIC CHEMISTRY to CHAP 26: POLYMERS).

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10th Class Chemistry Second half Book Paper

10th Class · Chemistry · Punjab (PTB)

Name: ____________Roll No: ________Class/Section: ________Date: ________Total marks: 60Time: About 2 hours (objective and subjective)

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

  1. Hydrocarbons containing at least one double or triple bond are called:

    1. Saturated hydrocarbons

    2. Unsaturated hydrocarbons

    3. Alkanes

    4. Monosaccharides

  2. Gasoline has range of carbon atoms:

    1. 1–4

    2. 5–6

    3. 6–10

    4. 10–14

  3. What serves as the basic building blocks for most lipids?

    1. Amino acids

    2. Glucose molecules

    3. Fatty acids

    4. Glycerol

  4. What is the byproduct formed along with an ester in esterification?

    1. H2

    2. CO2

    3. H2O

    4. O2

  5. Which monomer is polymerized to produce polypropylene?

    1. Propylene

    2. Ethylene

    3. Styrene

    4. Vinyl Chloride

  6. Which of the following is NOT one of the first four aliphatic alcohols used as fuel?

    1. Methanol

    2. Ethanol

    3. Propanol

    4. Pentanol

  7. The part of the IUPAC name that indicates the presence of a substituent group attached to the parent chain is:

    1. Root

    2. Suffix

    3. Prefix

    4. Bond

  8. What equipment is used to extract liquid petroleum after the flow of gases ceases?

    1. Pumps

    2. Drills

    3. Filters

    4. Burners

  9. Which fatty acid do we get from olive oil?

    1. Lauric acid

    2. Palmitic acid

    3. Oleic acid

    4. Stearic acid

  10. What is continuously done to the liquid present in the fermentation tank?

    1. Heated to boiling

    2. Evaporated completely

    3. Frozen to ice

    4. Stirred continuously

  11. Which of the following monomer is polymerized to produce polystyrene?

    1. Ethylene

    2. Vinyl chloride

    3. Styrene

    4. Propylene

  12. In the hydration reaction, ethene reacts with:

    1. Liquid water

    2. Steam

    3. Ice

    4. All

Q2. Short questions (Attempt any 5 of 8 · 5 × 2 = 10)

  1. Why is acetylene gas used for welding and cutting purposes?

  2. What information does the "Root" provide in IUPAC nomenclature? Give an example.

  3. How is acetylene gas used in the food industry?

  4. What is the difference between saturated and unsaturated hydrocarbons?

  5. Do you expect ethyne to decolourize a cold solution of KMnO4?

  6. Name the three parts that make up the entire IUPAC name of an organic compound.

  7. How ethene is oxidized by cold aqueous solution of potassium permanganate.

  8. Define organic chemistry.

Q3. Short questions (Attempt any 5 of 8 · 5 × 2 = 10)

  1. How does acetic acid react with Mg and MgCO3?

  2. By what percentage can ethanol reduce greenhouse gas emissions compared to petrol?

  3. What is the chemical name and formula of the salt obtained by reacting ethanoic acid with marble chips?

  4. How does the purity of ethanol differ between the hydration of ethene and fermentation processes?

  5. What are carboxylic acids?

  6. Why does the amount of heat evolved during the burning of alcohols go on increasing from lower to higher alcohols?

  7. Explain the function of a preservative.

  8. Why is bioalcohols considered "carbon netural"?

Q4. Short questions (Attempt any 5 of 8 · 5 × 2 = 10)

  1. How can chemists change the specific properties of a polymer?

  2. What is HCG and when is it produced in the body?

  3. What is the role of catalyst in addition polymerization?

  4. Which commercial products are obtained from oils and fats?

  5. Distinguish between natural and man-made polymers.

  6. How do vitamins differ from carbohydrates, lipids, and proteins regarding energy provision?

  7. Define monomers and polymers.

  8. Name the type of animal fats that are made from milk.

Q5. Long questions (Attempt any 2 of 3 · 2 × 9 = 18)

  1. Differentiate between addition and condensation polymerizations.

  2. What are flavouring agents? Which carboxylic acids are used as flavouring agents?

  3. Write names, boiling range, composition and use of fractions of petroleum.