Write balanced chemical equations for the preparation of Hydrogen, when the following are used :

(i) Alkali

(ii) Non metal

(i) Hydrogen from alkali

$\text{Zn} + 2\text{NaOH} \longrightarrow \underset{\text{[sodium zincate]}}{\text{Na}$2\text{ZnO}2} + \text{H}_2 \text{[g]}

(ii) Hydrogen from non-metal

$\underset{\text{hot coke}}{\text{C}} + \underset{\text{steam}}{\text{H}$2\text{O}} \xrightarrow{1000 \degree \text{C}} \underset{\text{water gas}}{[\text{CO} + \text{H}2 ]} - \Delta