Match List-I with List-II
|
List-I: Compound |
List-II: Application |
|
(A) Methanol |
(I) Used in wine making |
|
(B) Ethanol |
(II) Wood Spirit |
|
(C) Diethyl ether |
(III) Carbolic acid |
|
(D) Phenol |
(IV) Anaesthetic |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → (A) - (II), (B) - (I), (C) - (IV), (D) - (III)
Several alcohols, phenols and ethers are better known by old common names that come from their source, or by their main use. The list pairs each compound with one of these.
(A) Methanol — This matches (II) Wood Spirit. Methanol was once made by the destructive distillation of wood, hence the name wood spirit. Today it is made from carbon monoxide and hydrogen:
\( \displaystyle \ce{CO + 2H2} \xrightarrow[573-673\ \mathrm{K}]{\ce{ZnO-Cr2O3}\text{, 200-300 atm}} \ce{CH3OH} \)
(B) Ethanol — This matches (I) Used in wine making. Ethanol is obtained by the fermentation of sugars by the enzymes of yeast, as in the making of wine from grapes:
\( \displaystyle \ce{C6H12O6} \xrightarrow{\text{zymase}} \ce{2C2H5OH + 2CO2} \)
(C) Diethyl ether — This matches (IV) Anaesthetic. Ethoxyethane was widely used as a general anaesthetic in surgery; today it is used mainly as a solvent.
(D) Phenol — This matches (III) Carbolic acid. Phenol, \( \ce{C6H5OH} \), was first isolated from coal tar and is weakly acidic, so it was named carbolic acid.
Shortcut: (A)-(II) appears only in Option (1).