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Punjab (PTB) · Quarter book test · Free

10th Class Chemistry 3rd Quarter Book Paper

40 marks · 1 hour · 28 questions. Covers: 4 chapters (CHAP 22: HYDROCARBONS to CHAP 25: BIOCHEMISTRY).

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10th Class Chemistry 3rd Quarter Book Paper

10th Class · Chemistry · Punjab (PTB)

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

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

  1. Gasoline has range of carbon atoms:

    1. 1–4

    2. 5–6

    3. 6–10

    4. 10–14

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

    1. Methanol

    2. Ethanol

    3. Propanol

    4. Pentanol

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

    1. Pumps

    2. Drills

    3. Filters

    4. Burners

  6. In the hydration reaction, ethene reacts with:

    1. Liquid water

    2. Steam

    3. Ice

    4. All

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

    1. Lauric acid

    2. Palmitic acid

    3. Oleic acid

    4. Stearic acid

  8. 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

  9. is a boiling range of:

    1. Diesel oil

    2. Kerosene oil

    3. Gasoline

    4. Fuel oil

  10. Which two alcohols are active ingredients in certain oral and topical drug products?

    1. Methanol & Ethanol

    2. Ethanol & Isopropanol

    3. Propanol & Butanol

    4. Methanol & Butanol

  11. Which of the following is a primary source of cellulose?

    1. Potatoes

    2. Rice

    3. Wheat

    4. Wood and cotton

  12. Which ester provides the flavour of pineapple?

    1. Ethyl butyrate

    2. Methyl salicylate

    3. Methyl butyrate

    4. n-Amyl acetate

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

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

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

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

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

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

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

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

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

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

  10. What are carboxylic acids?

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

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

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

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

  2. Explain the combustion of alcohols.

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

  4. What are DNA and RNA? Describe the role played by them in our body.