Chemistry 0620 · IGCSE · Elements, compounds and mixtures
Elements, compounds and mixtures — practice question
The substances below are listed.
brass
calcium oxide
carbon monoxide
diamond
glucose
hydrogen
litmus
magnesium bromide
methyl orange
sodium chloride
stainless steel
thymolphthalein
water
zinc oxide
Use these substances to answer the questions that follow.
Each substance may be chosen once, more than once, or not used at all.
(a)[1]
State the substance produced when calcium carbonate is thermally decomposed in the blast furnace.
(b)[1]
State which substance is the mixture of copper and zinc.
(c)[1]
State which substance becomes yellow when an alkali is added.
(d)[1]
State which substance is one of the reactants in photosynthesis.
(e)[1]
State which substance is a salt containing a positive ion with charge of 1+.
(f)[1]
State which substance is the compound that reduces iron(III) oxide in the blast furnace.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “CaO” …