A solution of NaNO₃, when treated with a mixture of Zn dust and 'A' yields ammonia. 'A' can be

The reaction for obtaining the metal (M) from its oxide (M₂O₃) ore is given by

$${M_2}{O_3}(s) + 2Al(l)\buildrel {Heat} \over \longrightarrow A{l_2}{O_3}(l) + 2M(s)$$, (s = solid, l = liquid) in that case, M is

At room temperature, the reaction between water and fluorine produces