Which from the following concentrations of a weak electrolyte solution exhibits maximum molar conductivity?

Which among the following is NOT dicarboxylic acid?

What is IUPAC name of following compound?

Consider the following cell $\mathrm{E}^{\circ}$ cell $=1.007 \mathrm{~V}$ and $\mathrm{E}^{\circ}$ calomel $=0.242 \mathrm{~V}$ What is the standard potential of Zn ?