Match List-I with List-II:
| List-I | List-II |
|---|---|
Correct Answer :
(A)-(III), (B)-(1), (C)-(IV), (D)-(II)
Solution :
The correct option is (A)-(III), (B)-(I), (C)-(IV), (D)-(II) (noting that the option listed as "(B)-(1)" corresponds to "(B)-(I)").
Let's break down each matching pair step-by-step to understand why this option is correct:
1. (A) Antifreeze used in car engine matches with (III) Ethylene glycol:
Ethylene glycol is widely used as an antifreeze in automobile cooling systems. When mixed with water, it lowers the freezing point of the mixture and raises its boiling point. This prevents the coolant from freezing in cold weather and boiling over in hot weather.
2. (B) Starting material for picric acid matches with (I) Phenol:
Picric acid is chemically known as 2,4,6-trinitrophenol. It is synthesized by nitrating phenol, making phenol the starting material for its production. The nitration is typically done using concentrated sulfuric acid followed by concentrated nitric acid.
3. (C) Wood spirit matches with (IV) Methanol:
Methanol was historically obtained by the destructive distillation of wood, which is why it earned the common name "wood spirit" or "wood alcohol."
4. (D) By product of soap industry used in cosmetics matches with (II) Glycerol:
Saponification is the chemical reaction used to make soap by hydrolyzing fats or oils (triglycerides) with an alkali. During this process, glycerol (also known as glycerin) is produced as a major byproduct. Because of its excellent moisturizing and humectant properties, glycerol is widely purified and used in cosmetics and skincare products.
By putting all the matches together:
(A) matches with (III)
(B) matches with (I)
(C) matches with (IV)
(D) matches with (II)
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