Explain the role of carbon monoxide in the blast furnace. 

The following diagram shows the formation of wood charcoal.

Is the gas evolved combustible or non-combustible in nature? 

Carbon monoxide burns with:

What happens when carbon is treated with ferric oxide? Write the chemical equation for it.

Inhaling carbon monoxide is dangerous because it _____.

The following diagram shows the formation of wood charcoal.

Name the evolving gas. 

$\mathrm{CuCl}+\mathrm{CO}+2{\mathrm{H}}_2\mathrm{O}\to$_____

(A) $\mathrm{CuCl}.\mathrm{CO}.2{\mathrm{H}}_2\mathrm{O}$                    (B) ${\mathrm{CuCl}}_2$                     (C) $\mathrm{CuO}$

Enter your correct answer as A, B or C.