The bromide shown is treated with different reagents. Following the textbook convention, select all correct statements.

Covalent AgCN reacts through nitrogen to give the isocyanide, whereas ionic KCN reacts through carbon to give the nitrile. Silver nitrite (covalent) gives the nitroalkane, nitroethane, with C-N bonding. The claim that KNO2 gives mainly nitroethane is wrong by this convention: KNO2 is ionic and gives mainly the nitrite ester, $\mathrm{CH}{}_3\mathrm{CH}{}_2-\mathrm{O}-\mathrm{N}=\mathrm{O}$.