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Class 10 Chemistry Chapter 24 Carboxylic Acids Class Test 6 PDF | Punjab Board 2027 Model Papers
Grade 10 Chemistry Chapter 24 Carboxylic Acids Test 6
Prepare for the Class 10 Chemistry Chapter 24: Carboxylic Acids Class Test 6 with the Punjab Board 2027 Model Papers. This test covers Topics 24.4 to 24.5 from the prescribed Chemistry textbook and is designed according to the new syllabus issued by PECTAA Punjab. Students can use this test for revision, self-assessment, and exam preparation. It is part of the Class 10 Chemistry Chapter Wise Test Series and includes a Half Unit Test to help students strengthen their understanding of Carboxylic Acids for the 2027 Punjab Board examinations.
Chapter Wise Class Test
Test No.6
Chapter-24
Carboxylic Acids
1.
Acetic acid is used in industry mainly as a solvent for:
(a) Fertilizer(b) Medicines(c) Lacquers(d) Iodine
Answer: (c) Lacquers
2.
Which ester is used to extract caffeine from coffee?
(a) Methyl acetate(b) Ethyl acetate(c) Propyl acetate(d) Amyl acetate
Answer: (b) Ethyl acetate
3.
Which one of following acids is used as a flavour enhancer in food?
(a) Hydrochloric acid(b) Nitric acid(c) Citric acid(d) Sulphuric acid
Answer: (c) Citric acid
4.
Which compound is formed by the reaction of diols and dicarboxylic acids?
(a) Polyester(b) Polyamide(c) PVC(d) Polynitride
Answer: (a) Polyester
5.
Pure acetic acid is called:
(a) Glacial acetic acid(b) Maleate(c) Glacial maleic acid(d) Acetate
Answer: (a) Glacial acetic acid
6.
Which is used as a preservative in pickles?
(a) Acetic acid(b) Hydrochloric acid(c) Propionic acid(d) Citric acid
Answer: (a) Acetic acid
7.
Which of medicines is obtained from carboxylic acids?
(a) Paracetamol(b) Penicillin(c) Insulin(d) Aspirin
Answer: (d) Aspirin
8.
Which carboxylic acid is present in vitamin C?
(a) Citric acid(b) Ascorbic acid(c) Maleic acid(d) Acetic acid
Answer: (b) Ascorbic acid
Chapter Wise Class Test
Test No.6
Chapter-24
Carboxylic Acids
2. Write short answers to any six (6) questions.[6 × 2 = 12]
- (i)Why is acetic acid used in industries?It is a good solvent and a raw material: it is used to make vinegar, esters, dyes, plastics, synthetic fibres and lacquers.
- (ii)What is Flavouring Agents?Substances added to food and drinks to give or improve taste and smell. Esters and acids such as citric acid are common examples.
- (iii)Write the important role of Ester.Esters give fruity smells and flavours, so they are used in perfumes, soft drinks and sweets. They are also used as solvents (e.g. ethyl acetate) and to make polyester fibres.
- (iv)Write the used of Palmitic and stearic acid.They are fatty acids used to make soaps, candles, cosmetics and detergents.
- (v)Write the properties of glacial acetic acid.Pure (100%) acetic acid. It is a colourless liquid with a sharp vinegar-like smell, freezes into ice-like crystals at about 16.6°C, and is corrosive and miscible with water.
- (vi)Why are food preservatives added to food?To stop bacteria, yeast and mould from growing, so food stays fresh and does not spoil for a longer time.
- (vii)Write the application of carboxylic acid in medicine industry.Aspirin (acetylsalicylic acid) is made from a carboxylic acid and is a pain reliever and fever reducer. Ascorbic acid (vitamin C) is also a carboxylic acid.
- (viii)Write the name of any two esters and their flavours.Ethyl butanoate – pineapple flavour. Pentyl (amyl) acetate – banana flavour.
- (ix)Write the uses of acetic acid and oleic acid.Acetic acid: vinegar, food preservative, solvent, making esters and dyes.
Oleic acid: making soaps, cosmetics, lubricants and detergents.
Note: Attempt any one question.[5 × 1 = 5)
- 3.Write the industrial Application of carboxylic acid and Esters as synthetic fibers.A diol (e.g. ethylene glycol) reacts with a dicarboxylic acid (e.g. terephthalic acid) and joins repeatedly to form a long-chain polyester (Terylene/Dacron). It is used for clothes, ropes, fishing nets, sails and bottles. Carboxylic acids also help make nylon-type fibres and dyes.
- 4.Write the use of Esters in Daily Life.Perfumes and scents; flavours in sweets, ice cream and drinks; solvents such as ethyl acetate in nail polish remover and for extracting caffeine; paints and varnishes; polyester clothes; and fats and oils in food.
