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Punjab (PTB) · Chapter test · Free

10th Class Chemistry Chapter 11 TestCARBOXYLIC ACIDS

30 marks · 40 minutes · 21 questions. Covers: CHAP 24: CARBOXYLIC ACIDS.

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10th Class Chemistry Chapter 11 Test

10th Class · Chemistry · Punjab (PTB)

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

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

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

    1. H2

    2. CO2

    3. H2O

    4. O2

  2. 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

  3. Which ester provides the flavour of pineapple?

    1. Ethyl butyrate

    2. Methyl salicylate

    3. Methyl butyrate

    4. n-Amyl acetate

  4. Which carboxylic acid is present in Vitamin C?

    1. Ascorbic acid

    2. Citric acid

    3. Acetic acid

    4. Malic acid

  5. During the oxidation of ethanol, hot acidified potassium manganate (VII) acts as:

    1. Reducing agent

    2. Dehydrating agent

    3. Oxidizing agent

    4. Catalyst only

  6. Which compound is used as a synthetic fiber?

    1. Methyl acetate

    2. Polyester

    3. Resin

    4. n-Amyl acetate

  7. Ethanoic acid reacts with methanol to produce which ester?

    1. Ethyl ethanoate

    2. Methyl ethanoate

    3. Methyl methanoate

    4. Ethyl methanoate

  8. What colour change occurs in potassium manganate (VII) during the oxidation of ethanol?

    1. Purple to colourless

    2. Colourless to purple

    3. Orange to green

    4. Red to blue

  9. Which of the following is NOT used as a raw foodstuff for vinegar production?

    1. Malt

    2. Rice

    3. Potato mesh

    4. Plastic waste

  10. Which pair of compounds reacts to form the synthetic polymer known as polyester?

    1. Esters and water

    2. Diols and dicarboxylic acids

    3. Methanol and acetic acid

    4. Water and diols

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

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

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

  3. What are carboxylic acids?

  4. Explain the function of a preservative.

  5. Why do esters generally have a pleasant smell and what is their main use in daily life?

  6. Why sufficient oxygen is provided during fermentation to prepare acetic acid from ethanol?

  7. Which carboxylic acid derivative is used to make cellulose acetate plastic?

  8. Explain the difference between a fermentation reaction and a chemical reaction.

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

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

  2. Discuss reactions of carboxylic acids as acids.

  3. Describe the commercial production of ethanoic acid through oxidative fermentation.