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Published on: 13/05/2022
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Questions + Answers key
Take MCQ Science Test1.
Differentiate soaps and detergents.
2.
How do detergents cause water pollution? Suggest remedial measures to prevent this pollution?
3.
How is ethanoic acid prepared from ethanol? Give the chemical equation.
4.
Classify the following compounds based on the pattern of carbon chain and give their structural formula:
(i) Propane
(ii) Benzene
(iii) Cyclobutane
(iv) Furan
5.
Name the simplest ketone and give its structural formula.
1.
| S. No | Soap | Detergent |
|---|---|---|
| i) | Soap is a sodium salt of long chain fatty acids. | Detergent is sodium salt of sulphonic acids. |
| ii) | The ionic part of a soap is -COO-Na+. | The ionic part in a detergent is -SO3-Na+. |
| iii) | It is prepared from animal fats or vegetable oils. | It is prepared from hydrocarbons obtained from crude oil. |
| iv) | Soaps are biodegradable. | Most of the detergents are non biodegradable. |
2.
(i) Some detergents having a branched hydrocarbon chain are not fully biodegradable by microorganisms present in water.
(ii) So they settle as insoluble chemical in water bodies.
(iii) To avoid this type of water pollution, we should. use detergents which have straight hydrocarbon chains.
(iv) Because these are easily degraded by bacteria.
3.
Ethanoic acid is prepared by the oxidation of ethanol in the presence of alkaline potassium permanganate or acidified potassium dichromate.
4.
| Compound | Carbon chain | Structural formula |
| (i) Propane | Saturated compounds open chain compounds | CH3-CH2-CH3 |
| (ii) Benzene | Aromatic compounds in carbocyclic compounds | .JPG) |
| (iii) Cyclobutane | Alicyclic compounds contain one or more Carbocyclic compounds. | .JPG) |
| (iv) Furan | Heterocyclic compounds contains carbon and other atoms like Oxygen, Nitrogen, Sulphur, etc., | .JPG) |
5.
| Simplest Ketone | Structural formula |
| Acetone |  |
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Tamilnadu Stateboard 10th Standard Subjects
Tamilnadu Stateboard Standards
