What chemicals are added for residual dissolved oxygen and carbon dioxide?
A. sodium sulphite
B. hydrazine
C. alum
D. all of the mentioned
Answer:D
What chemicals are added for residual dissolved oxygen and carbon dioxide?
A. sodium sulphite B. hydrazine C. alum D. all of the mentioned
Explanation: Na2SO3 and N2H4 are used to remove residual gasses.