Chemistry 0620 · IGCSE · Elements, compounds and mixtures
Elements, compounds and mixtures — practice question
The list below shows a range of substances.
ammonium nitrate
carbon monoxide
copper(II) chloride
ethane
ethene
litmus
methane
methyl orange
sodium chloride
sodium sulfate
sulfur dioxide
thymolphthalein
Use only the substances in the list to answer the questions that follow. Each substance may be chosen once, more than once, or not chosen at all.
Give the name of the substance that:
(a)[1]
changes from blue to colourless when acid is added
(b)[1]
is found in many fertilisers
(c)[1]
is a salt whose negative ion carries a charge of $2-$
(d)[1]
is a waste gas produced during digestion in animals
(e)[1]
is a hydrocarbon molecule containing a total of five atoms
(f)[1]
is a compound of a transition element.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Thymolphthalein” …