AIPMT 2011 Mains Mock Test

In the extraction of iron, which of the following reactions pertains to the formation of slag in the blast furnace?

A solution contains ${\text{Ag}}^{+}$ and ${\text{Pb}}^{2+}$ at $0.10\text{M}$. Aqueous $\text{HCl}$ is added until $[{\text{Cl}}^{-}]=0.10\text{M}$. What are the concentrations of ${\text{Ag}}^{+}$ and ${\text{Pb}}^{2+}$ at equilibrium? ($K_{sp}$ for $\text{AgCl}=1.8\times 10^{-10}$, $K_{sp}$ for ${\text{PbCl}}_2=1.7\times 10^{-5}$)

Which of the following structures is the most preferred and hence of lowest energy for ${\text{SO}}_3$?

The unit of rate constant for a zero order reaction is:

A solution contains ${\text{Fe}}^{2+}$, ${\text{Fe}}^{3+}$ and ${\text{I}}^{-}$ ions. It was treated with iodine at $35^{\circ }\text{C}$. $E^{\circ }$ for ${\text{Fe}}^{3+}/{\text{Fe}}^{2+}=+0.77\text{V}$ and $E^{\circ }$ for ${\text{I}}_2/2{\text{I}}^{-}=0.536\text{V}$. The favourable redox reaction is: