Question

Which from following is a first stage in preparation of viscose rayon ?

• A. \(\text{Cell}-\text{OH}+\text{NaOH}\)
• B.

  

• C.

  

• D.

  

Hint:

Viscose rayon begins by treating cellulose with sodium hydroxide to make alkali cellulose.

Answer 1

The Correct Option is A

Step 1: Order of the process:
Cellulose pulp is first soaked in sodium hydroxide, then shredded and aged, then treated with carbon disulphide, and finally spun into an acid bath.

Step 2: Identify the first step:
Soaking in NaOH corresponds to $\text{Cell-OH} + \text{NaOH}$ giving sodium cellulosate. Carbon disulphide and acid come later, so (A) is the first stage.

Final Answer:
Cellulose treated with NaOH. \[ \boxed{\text{(A)}} \]