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MCQ on redox titrations: Page-3

Which of the following is a self indicating indicator
(A) potassium hexacyanoferrate

(A) S

(B) Q

(C) P,R

(D) R,S

The oxidation state of sulphur in sodium metabisulphite, Na2S2O5 is

(A) -2

(B) -4

(C) +3

(D) +4

Which of the following acts as external indicator

(A) P,S

(B) Q,R

(C) P

(D) R

All of the following can be used as indicator electrodes, except

(A) Silver-silver chloride electrode

(B) Mercury –mercury chloride electrode

(C) Copper-copper chloride electrode

(D) Calomel electrode

In silver-silver chloride electrode, the usual concentration of KCl used is

(A) Zero

(B) 0.1 M

(C) 1M

(D) Saturated