Which of the following has the highest equivalent weight?

Which among the following has maximum number of atoms among the following?

What volume of 0.1 $N$ oxalic acid solution can be reduced by 250 g of an 8 per cent by weight ${\rm{KMn}}{{\rm{O}}_4}$ solution?

The eq. wt. of ${\rm{KMn}}{{\rm{O}}_4}$ in the reaction, ${\rm{MnO}}_4^ - + {\rm{M}}{{\rm{n}}^{2 + }} + {{\rm{H}}_2}{\rm{O}} o {\rm{Mn}}{{\rm{O}}_2} + {{\rm{H}}^ + }$ (unbalanced) is :

56g of CO contains (NA = Avogadro’s No.)

Which has maximum number of atoms ?

The eq. wt. of ${{\rm{I}}_2}$ in the change ${{\rm{I}}_2} o {\rm{IO}}_3^ -$ is :

Equivalent mass of ${\rm{N}}{{\rm{a}}_2}{{\rm{S}}_2}{{\rm{O}}_3}$ in its reaction with ${{\rm{I}}_2}$ is equal to :

The equivalent weight of oxalic acid (H$_2$C$_2$O$_4$.2H$_2$O) is:

Mole and millimole of reactants react in the ……….as represented by balanced stoichiometric equation.

25 mL of 0.50 $M{{\rm{H}}_2}{{\rm{O}}_2}$ solution is added to 50 mL of 0.20 M $M{\rm{KMn}}{{\rm{O}}_4}$ in acidic solution. Which of the following statements is true?