Question

Give two examples of direct combination when two compounds are involved by writing chemical equations.

Answer 1

Direct combination: The reaction in which two or more elements or compounds combine to form a single product is called direct combination reaction.

• Two examples of direct combination when two compounds are involved are:

$\mathrm{CaO}\left(\mathrm{s}\right)+{\mathrm{CO}}_2\left(\mathrm{g}\right)\stackrel{}{\to }{\mathrm{CaCO}}_3\left(\mathrm{s}\right)$

$2{\mathrm{NH}}_3\left(\mathrm{g}\right)+{\mathrm{H}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)\stackrel{}{\to }{\left({\mathrm{NH}}_4\right)}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)$