Chemistry 5070/21 — May/June 2020
Cambridge O-Level · Theory · worked solutions for every part, with the mark scheme
10
questions
75
marks
90
minutes
Topics Stoichiometry · Acids, Bases and Salts · Chemical Reactions · Organic Chemistry · Atoms, Elements and Compounds · Chemistry of the Environment · +6 more
Q15MAcids, Bases and SaltsAtoms, Elements and CompoundsFree sample
Choose from the following oxides to answer the questions.
calcium oxide
carbon monoxide
copper(II) oxide
nitrogen dioxide
nitrogen monoxide
silicon dioxide
sulfur dioxide
water
zinc oxide
Each oxide may be used once, more than once or not at all.
Which oxide:
(a)1M
is used as a food preservative
______
(b)1M
is amphoteric
______
(c)1M
has a molecule that contains only 15 protons
______
(d)1M
has a high melting point because it has a giant covalent structure
______
(e)1M
reacts with dilute sulfuric acid to make a blue solution?
______
The rest of this paper
9 more questions- Q2Metals · Chemical Reactions · Electrochemistry · Chemistry of the Environment8M
- Q3Stoichiometry · Chemical Energetics · Chemical Reactions8M
- Q4Organic Chemistry · States of Matter · Stoichiometry · Chemical Reactions12M
- Q5Acids, Bases and Salts · Stoichiometry6M
- Q6Organic Chemistry · Acids, Bases and Salts6M
- Q7Chemistry of the Environment · Stoichiometry · Organic Chemistry · States of Matter · Atoms, Elements and Compounds10M
- Q8Atoms, Elements and Compounds · Acids, Bases and Salts · Stoichiometry10M
- Q9The Periodic Table · Chemical Reactions · Stoichiometry · Acids, Bases and Salts · Experimental Techniques and Chemical Analysis10M
- Q10Organic Chemistry10M
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