In volumetric analysis the solution to be analysed contains

A
known amount of chemicals in presence of indicator
B
unknown amount of chemicals in presence of indicator
C
known amount of chemicals in presence of an oxidizing agent always
D
unknown amount of chemicals in presence of reducing agent always

Solution:

basic principle of volumetric analysis is reagent of unknown concentration reacts with a chemical of unknown amount in the presence of an indicator mostly phenolphthalein to show the end point

Solution:

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