Question

Which of the following are reducing bleaching agents?
A. Sodium hydrosulphite
B. Sodium bisulphite
C. Sodium perborate
D. Sodium thiosulphate
E. Patassium permaganate
Choose the correct answer from the options given below:

• A. A, B and C only
• B. B, C and D only
• C. C, D and E only
• D. A, B and D only

Hint:

Oxidizing bleaches (like hydrogen peroxide or sodium perborate) are more common and permanent.
Reducing bleaches are gentler and often used on protein fibers like wool and silk to avoid fiber damage.

Answer 1

The Correct Option is D