GATE (TF) Textile 2006 Question Paper Solution | GATE/2006/TF/18

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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