Chemistry 5070/22 — May/June 2023

Cambridge O-Level · Theory · worked solutions for every part, with the mark scheme

questions

marks

105

minutes

Topics Chemical Reactions · Stoichiometry · Atoms, Elements and Compounds · Acids, Bases and Salts · Organic Chemistry · Metals · +6 more

Q16MAcids, Bases and SaltsMetalsChemical ReactionsFree sample

Choose from the following oxides to answer the questions.

CO
$\text{CO}_2$
CaO
CuO
$\text{Fe}_2\text{O}_3$
$\text{H}_2\text{O}$
$\text{SO}_2$
$\text{SiO}_2$
ZnO

Each oxide may be used once, more than once or not at all.

State which oxide:

(a)

is neutral

______

(b)

reacts with calcium oxide to form slag in the blast furnace

______

(c)

reacts with warm dilute hydrochloric acid to give a blue coloured solution

______

(d)

is amphoteric

______

(e)

contains an ion with an oxidation number of +3

______

(f)

decolourises acidified aqueous potassium manganate(VII).

______

The rest of this paper

9 more questions

Q2The Periodic Table · Chemical Reactions · States of Matter8M
Q3Stoichiometry · Acids, Bases and Salts · Experimental Techniques and Chemical Analysis9M
Q4Atoms, Elements and Compounds · Stoichiometry9M
Q5Chemical Reactions9M
Q6Chemical Energetics8M
Q7Organic Chemistry · Atoms, Elements and Compounds10M
Q8Electrochemistry · Atoms, Elements and Compounds6M
Q9Stoichiometry · Chemistry of the Environment8M
Q10Organic Chemistry7M

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