The strength of an aqueous NaOH solution is most accurately determined by titrating: (Note: consider that an appropriate indicator is used)
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a
Aq. NaOH in a burette and aq. Oxalic acid in a conical flask
b
Aq. NaOH in a volumetric flask and conc. H2SO4 in a conical flask
c
Aq. NaOH in a volumetric flask and aqueous oxalic acid in a burette
d
Aq. NaOH in a burette and conc. H2SO4 in a conical flask
answer is C.
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Detailed Solution
NaOH should not be taken in burette because it reacts with glass and the joints will be cemented. But in NCERT, it was given NaOH is taken in burette. So answer is 1 if we follow so.