Question

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Direct dyes exhibit poor wash fastness. Reason (R): Direct dyes do not react with the fibre structure but rely on dye to fibre associations such as hydrogen bonding and dipole moments to help with colour fastness after dyeing. In the light of the above statements, choose the most appropriate answer from the options given below:

• A. \( \text{Both (A) and (R) are correct and (R) is the correct explanation of (A)} \)
• B. \( \text{Both (A) and (R) are correct but (R) is not the correct explanation of (A)} \)
• C. \( \text{(A) is correct but (R) is not correct} \)
• D. \( \text{(A) is not correct but (R) is correct} \)

Hint:

To improve the wash fastness of direct dyes, "after-treatments" with fixing agents are often used to make the dye molecules larger and more trapped inside the fiber.

Answer 1

The Correct Option is A