Lawrie Ryan and Roger Norris Solutions for Chapter: Nitrogen, Exercise 7: EXAM-STYLE QUESTIONS

Ammonia is made from its elements in the Haber process. For the ammonium ion give the shape, including its bond angles.

Give the formulae of the following ammonium salt: ammonium chloride.

$$\begin{gathered} \mathrm{A}:{\mathrm{NH}}_3\mathrm{Cl} \\ \mathrm{B}:{\mathrm{NH}}_4\mathrm{Cl} \\ \mathrm{C}:{\mathrm{NH}}_2{\mathrm{Cl}}_2 \end{gathered}$$

(Enter your correct answer as $\mathrm{A}, \mathrm{B} \mathrm{or} \mathrm{C}$)

Give the formulae of the following ammonium salt: ammonium nitrate.

$$\begin{gathered} \mathrm{A}:{\mathrm{NH}}_4{\mathrm{NO}}_2 \\ \mathrm{B}:{\mathrm{NH}}_3{\mathrm{NO}}_3 \\ \mathrm{C}:{\mathrm{NH}}_4{\mathrm{NO}}_3 \end{gathered}$$

(Enter your correct answer as $\mathrm{A}, \mathrm{B} \mathrm{or} \mathrm{C}$)

Give the formulae of the following ammonium salt: ammonium sulphate.

$\mathrm{A}: {\left({\mathrm{NH}}_4\right)}_2{\mathrm{SO}}_4\mathrm{B}: {\left({\mathrm{NH}}_4\right)}_3{\mathrm{SO}}_4\mathrm{C}:\hspace{0.17em}\left({\mathrm{NH}}_4\right){\mathrm{SO}}_4$

(Enter your correct answer as $\mathrm{A}, \mathrm{B} \mathrm{or} \mathrm{C}$)

Phosphorus is the element below nitrogen in Group 15 of the periodic table. Its atomic number is $15$. 

Which molecule shows phosphorus in its lowest oxidation state? 

Phosphorus is the element below nitrogen in Group 15 of the periodic table. Its atomic number is 15. Write the electronic configuration of a phosphorus atom.

Phosphorus is the element below nitrogen in Group 15 of the periodic table. Its atomic number is 15. Suggest which element, Phosphorus or Nitrogen, has the  higher first ionisation energy and explain your reasoning.

The hydride of phosphorus is commonly called 'phosphine', ${\mathrm{PH}}_3$. Suggest the shape of the molecule of phosphine, and predict the $\mathrm{H}-\mathrm{P}-\mathrm{H}$bond angles, explain your reasoning.