Question

Select the combination reactions between: (i) elements, (ii) compounds and (iii) an element and a compound, for the given reaction.

$$\begin{gathered} 2{\mathrm{NH}}_3\left(\mathrm{g}\right)+{\mathrm{H}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)\to {\left({\mathrm{NH}}_4\right)}_2{\mathrm{SO}}_4 \\ \left(\mathrm{Ammonia}\right)(\mathrm{Sulphuric}(\mathrm{Ammonium}\mathrm{sulphate}) \\ \mathrm{acid}) \end{gathered}$$

Answer 1

Combination reactions:

These are the reactions in which the combination of compounds or elements takes place to give the products.

Elements and compounds:

Elements are composed of pure atoms of substances and cannot be further broken down into simpler units.

The compounds are composed of more than one element in it and can be split into smaller molecules.

Given equation:
The given reaction is a combination of the compounds Ammonia $\left({\mathrm{NH}}_3\right)$ and Sulphuric acid $\left({\mathrm{H}}_2{\mathrm{SO}}_4\right)$ to give Ammonium sulphate $\left[{\left({\mathrm{NH}}_4\right)}_2{\mathrm{SO}}_4\right]$ as the product.

$$\begin{gathered} 2{\mathrm{NH}}_3\left(\mathrm{g}\right)+{\mathrm{H}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)\to {\left({\mathrm{NH}}_4\right)}_2{\mathrm{SO}}_4 \\ \left(\mathrm{Ammonia}\right)(\mathrm{Sulphuric}(\mathrm{Ammonium}\mathrm{sulphate}) \\ \mathrm{acid}) \end{gathered}$$

Therefore the given reaction is the combination of (ii) compounds.