Question

Match the following reactants with their respective reaction types:

• A. Combination
• B. Displacement
• C. Double displacement

Answer 1

$N{H}_3\left(g\right)+HCl\left(g\right)\to N{H}_{4}Cl$(s), here two reactants combine to form one product, hence it is a combination reaction.

$B{r}_2\left(aq\right)+2KI\left(aq\right)\to 2KBr\left(aq\right)+I_2\left(aq\right)$: Bromine displaces iodine from potassium iodide, hence it is a displacement reaction.

$FeS\left(s\right)+2HCl\left(aq\right)\to FeC{l}_2\left(aq\right)+H_{2}S\left(g\right)$, it is a double displacement reaction, as their is an exchange of ions between $FeS$ and $HCl$.