Question

Determine the correctness or otherwise of the following Assertion [a] and Reason [r].
[a]: In crease resistant finishing process of cotton with DMDHEU, curing is not carried out in steam.
[r]: Steam causes DMDHEU to self-polymerise rather than crosslink cotton.

• A. Both [a] and [r] are true and [r] is the correct reason for [a]
• B. Both [a] and [r] are true and [r] is not the correct reason for [a]
• C. Both [a] and [r] are false
• D. [a] is true but [r] is false

Hint:

DMDHEU-based crease-resistant finishing requires dry-heat curing; steam does not support proper crosslink formation with cellulose.

Answer 1

The Correct Option is D

The assertion states that curing in crease-resistant finishing of cotton with DMDHEU is not carried out in steam. This statement is true because DMDHEU requires dry-heat curing to form crosslinks with cellulose. Steam curing does not provide the correct conditions for efficient crosslink formation in this process. The reason claims that steam causes DMDHEU to self-polymerise rather than crosslink cotton. This statement is false. DMDHEU does not undergo self-polymerisation due to steam. Instead, steam simply fails to facilitate the required crosslinking reaction between DMDHEU and cellulose. Therefore, the reason does not correctly explain the assertion and is factually incorrect. Thus, the assertion is true, but the reason is false.