S Block Elements Question 24
Question: Sodium thiosulphate is used in photography
[UPSEAT 1999]
Options:
A) To convert metallic silver into silver nitrate
B) AgBr grain is reduced to non-metallic silver
C) To remove metallic silver
D) To remove undecomposed AgBr in the form of $ Na_3[Ag(S_2O_3)_2] $ (a complex salt)
Show Answer
Answer:
Correct Answer: A
Solution:
Sodium thiosulphate is a reducing agent which converts metallic silver into silver salt.
BETA
