In which of the following processes does entropy increase?

Entropy is maximum in case of

Which of the following processes is associated with a decrease in entropy?

$\Delta S_{surr}$ for an exothermic reaction is

The standard entropies of $CO_{2(g)}$,$C_{(s)}$ and $O_{2(g)}$ are $213.5$,$5.690$ and $205 \ J \ K^{-1} \ mol^{-1}$ respectively. The standard entropy of formation of $CO_{2(g)}$ is ...... $J \ K^{-1} \ mol^{-1}$.

Which one of the following has $\Delta S^o$ greater than zero?