(A) Thermosetting polymers are cross linked polymers.
(R) Thermosetting polymers cannot be reused.

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Both (A) and (R) are true but (R) is not the correct explanation of (A)

Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are false

(A) is true but (R) is false

answer is B.

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Detailed Solution

Thermosetting polymers are cross-linked polymers that form strong, three-dimensional networks of covalent bonds when they are cured or heated.
The cross-linking process creates a rigid, durable material that cannot be softened or melted by heat or solvents, making thermosetting polymers highly resistant to deformation, chemical attack, and thermal degradation.
Examples of thermosetting polymers include epoxy resins, phenolic resins, and polyurethanes.
Thermosetting polymers form irreversible chemical bonds when they are cured or heated, which creates a rigid, cross-linked network that cannot be melted or reformed without breaking the covalent bonds.
Once they have been cured or set, thermosetting polymers cannot be re-melted or re-shaped, which means they cannot be easily recycled or reused.
In contrast, thermoplastic polymers can be melted and reshaped multiple times, which makes them more recyclable and reusable.
However, some research is being done to develop ways to recycle or upcycle thermosetting polymers by breaking down their cross-linked networks through chemical or thermal treatments.
So, both (A) and (R) are true but (R) is not the correct explanation of (A)

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