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|