1.1 Particulate Nature of Matter
Assignment 2
Use the following 'quiz' to test your knowledge and understanding of this sub-topic. You
will need access to a periodic table (Section 6 of the IB data booklet).
If you get an answer wrong, read through the explanation carefully to learn from your
mistakes.
1. Which reaction involves precipitation?
a) NaOH(aq) + H2SO4(aq) → Na2SO4(aq) + H2O(l)
b) CaCO3(s) + 2HCl(aq) → CaCl2(aq) + H2O(l) + CO2(g)
c) AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq)
d) Fe(s) + S(s) → FeS(s)
2. What is the sum of all the coefficients when the equation for the combustion of ethanol is
balanced using the smallest possible whole numbers?
______C2H5OH(l) + ___O2(g) → ___CO2(g) + ___H2O(l)
a) 8
b)19
c) 9
d) 9.5
3. Argon, carbon dioxide, oxygen and nitrogen are all present in air. What is the order in which the
gases will be formed when liquid air is slowly warmed?
Gas
Boiling point / oC
Ar
CO2
-186
-78
O2
-183
N2
-196
a) CO2 > Ar > O2 > N2
b) N2 > Ar > O2 > CO2
c) CO2 > O2 > Ar > N2
d) N2 > O2 > Ar > CO2
4. At high altitude snow can sublime. Which statement correctly describes this process?
a) Snow turns directly into water vapour.
b) Snow forms hard ice.
c) Snow turns into liquid water.
d) Snow turns into liquid water which then turns into water vapour.
Which is the correct order for the coefficients in the balanced equation for the reaction between
ammonia and oxygen to form nitrogen oxide and water
−NH3(g) + −O2(g) → −NO(g) + −H2O(g) ?
a) 4, 7, 4, 6
b) 4, 5, 4, 6
c) 2, 2, 2, 3
d) 2, 3, 2, 3