RoseMarie Gallagher and Paul Ingram Solutions for Chapter: Redox Reactions, Exercise 5: Checkup on Chapter 7

Identify the oxidising and reducing agents in the reaction given below : 

${\mathrm{C}}_{\left(\mathrm{s}\right)}+{\mathrm{PbO}}_{\left(\mathrm{s}\right)} \to {\mathrm{CO}}_{\left(\mathrm{g}\right)}+{\mathrm{Pb}}_{\left(\mathrm{s}\right)}$

Give the oxidation state of the underlined atom in aluminium oxide, ${\underline{\mathrm{Al}}}_2{\mathrm{O}}_3$.

Give the oxidation state of the underlined atom in, ammonia $\underline{\mathrm{N}}{\mathrm{H}}_3$.

Give the oxidation state of the underlined atom in carbonic acid, ${\mathrm{H}}_2\underline{\mathrm{C}}{\mathrm{O}}_3$.

Give the oxidation state of the underlined atom in phosphorus trichloride, $\underline{\mathrm{P}}{\mathrm{Cl}}_3$.

Give the oxidation state of the underlined atom in copper $\left(\mathrm{I}\right)$ chloride, $\mathrm{CuCl}$.

Give the oxidation state of the underlined atom in copper $\left(\mathrm{II}\right)$ chloride, $\underline{\mathrm{Cu}}{\mathrm{Cl}}_2$.

Comment on the oxidation states of the compounds copper $\left(\mathrm{I}\right)$ chloride,$\mathrm{CuCl}$ and copper $\left(\mathrm{II}\right)$ chloride, ${\mathrm{CuCl}}_2$.