Question

Which option(s) correctly match(es) the Class of additives used during polymer compounding with the corresponding Chemicals? \[ \begin{array}{|c|c|} \hline \text{Class of additives} & \text{Chemicals} \\ \hline P: \text{Antioxidant} & 1: \text{Phthalocyanine} \\ Q: \text{Flame retardant} & 2: \text{Di(2-ethylhexyl) phthalate} \\ R: \text{Plasticizer} & 3: \text{Tricresyl phosphate} \\ S: \text{Colorant} & 4: \text{Phenyl $\beta$-naphthyl amine} \\ \hline \end{array} \]

• A. P-4; Q-3; R-2; S-1
• B. P-4; Q-3; R-3; S-1
• C. P-1; Q-2; R-4; S-2
• D. P-2; Q-3; R-1; S-2

Hint:

Easy memory: - Antioxidant → Amine, - Flame retardant → Phosphate, - Plasticizer → Phthalate, - Colorant → Phthalocyanine.

Answer 1

The Correct Option is A, B

Step 1: Antioxidant.
- Antioxidants prevent degradation by oxidation. - Aromatic amines like Phenyl $\beta$-naphthyl amine are classic antioxidants. \(\Rightarrow P-4\).

Step 2: Flame retardant.
- Organophosphates (like tricresyl phosphate) are flame retardants. \(\Rightarrow Q-3\).

Step 3: Plasticizer.
- Di(2-ethylhexyl) phthalate (DEHP) is one of the most common plasticizers used in PVC. \(\Rightarrow R-2\).

Step 4: Colorant.
- Phthalocyanines are well-known colorants (blue/green pigments). \(\Rightarrow S-1\). Final Mapping: \[ P-4,\; Q-3,\; R-2,\; S-1 \] Final Answer: \[ \boxed{\text{(A) P-4; Q-3; R-2; S-1}} \]