Chemistry 5070 · O Level · Identification of ions and gases
Identification of ions and gases — practice question
Select from the compounds listed below to answer the questions that follow.
Ba(NO$_3$)$_2$
CaCO$_3$
CaO
CH$_4$
C$_3$H$_8$
Fe$_2$O$_3$
KMnO$_4$
NaNO$_3$
NO
SO$_2$
V$_2$O$_5$
Zn(NO$_3$)$_2$
Each compound may be used once, more than once, or not used at all.
Which compound
(a)[1]
is an atmospheric pollutant produced by lightning,
(b)[1]
is the main component of natural gas,
(c)[1]
is soluble in water and its aqueous solution produces a white precipitate when aqueous sodium sulfate is added,
(d)[1]
is the catalyst employed in the Contact Process for producing sulfuric acid,
(e)[1]
is formed when limestone undergoes thermal decomposition?
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “nitric oxide / nitrogen oxide / NO” …