Question

Match the following:

• A. a-(i), b-(iv), c-(ii), d-(iii)
• B. a-(ii), b-(iv), c-(i), d-(iii)
• C. a-(iii), b-(iv), c-(ii), d-(i)
• D. a-(iv), b-(iii), c-(ii), d-(i)

Hint:

Remember these common applications: \[ \text{Methanoic acid} \rightarrow \text{Textile industry} \] \[ \text{Ethanoic acid} \rightarrow \text{Vinegar} \] \[ \text{Hexanedioic acid (Adipic acid)} \rightarrow \text{Nylon-6,6 production} \] \[ \text{Sodium benzoate} \rightarrow \text{Food preservative} \]

Answer 1

The Correct Option is A

Step 1: Identify methanoic acid and its use.
Methanoic acid (formic acid, HCOOH) is the simplest carboxylic acid. It occurs naturally in ant venom. In industry, it is widely used in the textile and leather industries for dyeing, finishing, and tanning. Therefore: $a \rightarrow (i)$ Textile.
Step 2: Identify ethanoic acid and its use.
Ethanoic acid (acetic acid, $CH_3COOH$) is the most common carboxylic acid in everyday life. A dilute aqueous solution (about 5 to 8 percent) is known as vinegar, used widely as a food condiment and preservative. Therefore: $b \rightarrow (iv)$ Vinegar.
Step 3: Identify hexanedioic acid and its use.
Hexanedioic acid (adipic acid, $HOOC{-}(CH_2)_4{-}COOH$) is a dicarboxylic acid. It is a key monomer in the manufacture of nylon-6,6 by condensation polymerization with hexamethylenediamine. Therefore: $c \rightarrow (ii)$ Polymer.
Step 4: Identify sodium benzoate and its use.
Sodium benzoate ($C_6H_5COONa$) is the sodium salt of benzoic acid. It is widely used as a food preservative (E211), inhibiting growth of yeasts, molds, and bacteria. Found in soft drinks, juices, and pickles. Therefore: $d \rightarrow (iii)$ Food preservative.
Step 5: Compile the matching.
$a \rightarrow (i)$, $b \rightarrow (iv)$, $c \rightarrow (ii)$, $d \rightarrow (iii)$.
Step 6: State the final answer.
\[ \boxed{a-(i),\ b-(iv),\ c-(ii),\ d-(iii)} \]