Discussion

Select the correct option to match the Compound/Additive to its most suitable Function from the table given below:

Compound/Additive		Function
P	Azocarbonamide	I	Flame retardant
Q	2-(2-hydroxyphenyl)-benzotriazole	II	Coupling agent
R	(3-Aminopropyl)triethoxysilane	III	Blowing agent
S	Ammonium polyphosphate	IV	UV-absorber

Answer: B

The correct matching is P-III ; Q-IV ; R-II ; S-I.

Azodicarbonamide decomposes on heating to release nitrogen and other gases, so it is a chemical blowing agent for foams (III).
2-(2-Hydroxyphenyl)benzotriazoles absorb UV light and dissipate it as heat, protecting the polymer: a UV absorber (IV).
(3-Aminopropyl)triethoxysilane bonds to glass or mineral surfaces through its silanol groups and to the polymer through its amine: a coupling agent (II).
Ammonium polyphosphate is an intumescent flame retardant (I).

Option A swaps the blowing agent and the UV absorber, and the others misplace the silane or the phosphate.

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