Chemistry 0620 · IGCSE · Elements, compounds and mixtures
Elements, compounds and mixtures — practice question
The substances in the list are shown below.
ammonia
bauxite
carbon dioxide
carbon monoxide
ethanol
hematite
oxygen
sodium chloride
sulfur dioxide
Use this list to answer the questions.
A substance can be selected once, more than once, or not selected at all.
State which substance is:
(a)[1]
the name of an element
(b)[1]
the ore from which aluminium is obtained
(c)[1]
a gas responsible for acid rain
(d)[1]
used as a fuel source
(e)[1]
an ionic compound
(f)[1]
the product made in the Haber process
(g)[1]
a substance made in respiration
(h)[1]
a poisonous product of incomplete combustion of hydrocarbons
(i)[1]
the gas produced in the nitrate ions test
Worked solution & mark scheme
This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: “oxygen” …