No. HNO3 is itself an oxidising agent whereas HCl being oxidisable to chlorine and hydrogen consumes permanganate.
Oxidation number of manganese in KMNO4 is 7.
Hot solutions may expand glass and thereby introduce errors in volume measurement.
Heating is done to enhance the rate of reaction and increase activation energy.
It may decompose oxalic acid into carbon dioxide [CO2] and carbon monoxide [CO].
The reaction in which product acts as a catalyst to the reaction.
No, rinsing of the flask will increase the volume more than pipetted one.
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