Question 18 (Textile Engineering & Fibre Science)
Determine the correctness or otherwise of the following assertion (a) & reason (r)
Assertion: The viscosity of the solution of sodium cellulose xanthate first decreases and then increases during the process of ripening – an important unit operation of viscose manufacturing.
Reason: The viscosity initially decreases because of dexanthation and then rises as the distribution of xanthate groups along the cellulose molecule becomes more uniform with time
| (A) | Both (a) and (r) are incorrect |
| (B) | (a) is incorrect but (r) is correct |
| (C) | Both (a) and (r) are correct |
| (D) | (a) is correct but (r) is incorrect |
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