Question

Match List-I with List-II

List-I (Active Packaging System)	List-II (Chemical Component)
(A) \(CO_2\) absorber under high humidity	(I) \(FeCO_3\)
(B) \(CO_2\) absorber under normal condition	(II) \(Na_2CO_3\)
(C) \(CO_2\) emitter	(III) \(KMnO_4\)
(D) \(C_2H_4\) absorber	(IV) \(Ca(OH)_2\)

• (A) - (II), (B) - (III), (C) - (IV), (D) - (I)
• (A) - (II), (B) - (IV), (C) - (I), (D) - (III)
• (A) - (IV), (B) - (III), (C) - (I), (D) - (II)
• (A) - (III), (B) - (IV), (C) - (I), (D) - (II)

Hint:

Remember that potassium permanganate (\(\text{KMnO}_4\)) is the standard chemical used for ethylene scavenging in active packaging. Matching (D) with (III) immediately helps narrow down the correct option.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Active packaging systems incorporate chemical components within the packaging material or headspace to interact with gases, moisture, or light, extending product shelf life.
These systems can scavenge (absorb) unwanted gases or emit beneficial gases during storage.

Step 2: Detailed Explanation:
Let us match the active packaging systems in List-I with their chemical components in List-II:
- (A) \(\text{CO}_2\) absorber under high humidity: Sodium carbonate (\(\text{Na}_2\text{CO}_3\), II) requires moisture to dissolve and react with carbon dioxide to form sodium bicarbonate. Thus, (A) matches with (II).
- (B) \(\text{CO}_2\) absorber under normal conditions: Calcium hydroxide (\(\text{Ca(OH)}_2\), IV) is a highly effective dry scavenger that reacts directly with \(\text{CO}_2\) to form calcium carbonate under normal packaging conditions. Thus, (B) matches with (IV).
- (C) \(\text{CO}_2\) emitter: Ferrous carbonate (\(\text{FeCO}_3\), I) is used in dual-action systems. It reacts with moisture and oxygen inside the package to scavenge oxygen while simultaneously releasing carbon dioxide gas. Thus, (C) matches with (I).
- (D) \(\text{C}_2\text{H}_4\) (ethylene) absorber: Potassium permanganate (\(\text{KMnO}_4\), III) is a strong oxidizing agent used to oxidize and scavenge ethylene, preventing the premature ripening of fresh produce. Thus, (D) matches with (III).
Combining these pairs gives the match: (A) - (II), (B) - (IV), (C) - (I), (D) - (III).

Step 3: Final Answer:
The correct matching sequence is (A) - (II), (B) - (IV), (C) - (I), (D) - (III). Hence, the correct option is (B).