Give the chemical reactions for the preparation of water gas and producer gas.

(N/A) Water gas is prepared by passing steam over hot coke at high temperatures. The mixture of $CO$ and $H_{2}$ produced is known as water gas or synthesis gas.
$C_{(s)} + H_{2}O_{(g)} \xrightarrow{1273 \ K} CO_{(g)} + H_{2(g)}$
Producer gas is prepared by passing air over hot coke. The mixture of $CO$ and $N_{2}$ produced is called producer gas.
$2C_{(s)} + O_{2(g)} + 4N_{2(g)} \xrightarrow{1273 \ K} 2CO_{(g)} + 4N_{2(g)}$