Chemistry 5070/21 — May/June 2023

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

questions

marks

105

minutes

Topics Chemical Reactions · Atoms, Elements and Compounds · Chemistry of the Environment · Organic Chemistry · Experimental Techniques and Chemical Analysis · Stoichiometry · +6 more

Q16MMetalsAcids, Bases and SaltsAtoms, Elements and CompoundsChemical ReactionsChemistry of the EnvironmentOrganic ChemistryFree sample

Choose from the following oxides to answer the questions.

$\text{Al}_2\text{O}_3$
$\text{CO}$
$\text{CO}_2$
$\text{CaO}$
$\text{Fe}_2\text{O}_3$
$\text{H}_2\text{O}$
$\text{Na}_2\text{O}$
$\text{SO}_2$
$\text{SiO}_2$

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

State which oxide:

(a)

is a solid made during the thermal decomposition of limestone in the blast furnace

______

(b)

reacts with both acids and alkalis

______

(c)

has a giant covalent structure

______

(d)

has an ion with an oxidation number of +2

______

(e)

turns white anhydrous copper(II) sulfate blue

______

(f)

is made during the fermentation of aqueous glucose to make ethanol.

______

The rest of this paper

9 more questions

Q2The Periodic Table · Chemical Reactions · Experimental Techniques and Chemical Analysis8M
Q3Stoichiometry · Acids, Bases and Salts · Experimental Techniques and Chemical Analysis8M
Q4Atoms, Elements and Compounds · Stoichiometry9M
Q5Chemical Reactions · Chemical Energetics10M
Q6Chemical Energetics8M
Q7Organic Chemistry · Atoms, Elements and Compounds · Experimental Techniques and Chemical Analysis11M
Q8Electrochemistry6M
Q9Stoichiometry · Chemical Reactions · Chemistry of the Environment · States of Matter8M
Q10Organic Chemistry · Chemistry of the Environment6M

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