Match List – I with List – II and select the correct answer using the code given –

List – I

(1) Natural polymers

(2) Thermosetting polymers

(3) Protein

(4) Thermoplastic polymers

List – II

(a) Bakelite

(b) Polymer of amino acids

(c) P.V.C.

(d) Starch and cellulose Code -

Correct option is B

The correct answer is (b) 1-D, 2-A, 3-B, 4-C. Matching the items from List I and List II:
1. Natural polymers - Starch and cellulose: Both are naturally occurring polymers, found in plants.
2. Thermosetting polymers - Bakelite: A type of plastic that, once hardened, cannot be remelted.
3. Protein - Polymer of amino acids: Proteins are made up of long chains of amino acids.
4. Thermoplastic polymers - P.V.C.: Polyvinyl chloride, a plastic that can be remelted and reshaped.
Important Key Points:
· Natural polymers like starch and cellulose are essential in nature and industry.
· Thermosetting polymers like Bakelite are used in electrical insulators and other durable products.
· Proteins are biopolymers made of amino acids, vital for all living organisms.
· Thermoplastic polymers like PVC are widely used in construction, packaging, and manufacturing.
· Understanding the properties of these materials is crucial for their applications.
· Matching lists is a common method to test knowledge of material properties and uses.
Knowledge Booster:
· Bakelite: A pioneer in the plastics industry, used for its non-conductive properties.
· Starch and cellulose: Both are carbohydrates, with starch being an energy source and cellulose a structural component in plants.
· P.V.C.: Used in pipes, cables, and as a material for flooring.