Question

Match the LIST-I with LIST-II:

• A. A-III, B-IV, C-I, D-II
• B. A-I, B-II, C-III, D-IV
• C. A-I, B-III, C-IV, D-II
• D. A-IV, B-I, C-II, D-III

Hint:

To remember NBR, think "Nitrile = Non-reactive to oil." For UPVC, the "U" stands for "Unplasticized" (Rigid), which is why it's used for stiff structures like windows rather than flexible hoses!

Answer 1

The Correct Option is A

Concept: The industrial application of polymers is dictated by their specific mechanical properties, chemical resistance, and thermal stability.

Step 1: Match A (PU).
Polyurethane (A) is widely used in foams and elastomers due to its durability and comfort, making it a primary material for shoe-soles (III).

Step 2: Match B (UPVC).
Unplasticized PVC (B) is rigid and weather-resistant, making it the standard material for construction elements like window-panels (IV).

Step 3: Match C (NBR).
Nitrile Rubber (C) has exceptional resistance to petroleum oils and fuels, leading to its extensive use in automotive oil seals (I).

Step 4: Match D (NR).
Natural Rubber (D) has high tear strength and resilience, which is critical for the demanding performance requirements of vehicle tyres (II).