Standard Grade Revision
Units 1 and 2.
Q.1 When green copper carbonate is added to
hydrochloric acid solution a rapid reaction takes place in
which a gas is given off and a blue solution is formed.
Give two pieces of information which would prove that a
chemical reaction had taken place.
Answer:- 1) In the reaction a gas is formed.
2) In the reaction there is a colour change – the
green copper carbonate changes to a blue
Standard Grade Chemistry
solution..
Units 1 and 2 Revision
Q2. When silvery magnesium ribbon is burned in air the
magnesium combines with oxygen in the air to form
white magnesium oxide. In the reaction heat and
light energy are given out.
(a) Give two pieces of information that shows that a chemical
reaction has taken place.
(b) What word is used to describe a reaction in which energy
is given out?
(c) Write a word equation for the reaction.
Answers:(a) 1. Colour change (Silver magnesium to white powder).
2. Energy given out.
(b) Exothermic.
Burning magnesium in air
(c) Magnesium + Oxygen  Magnesium oxide
Units 1 and 2 Revision
Q3. Barium chloride and sodium sulphate solutions are both
colourless. When the two solutions are mixed a white solid
called barium sulphate is formed.
(a) Give one piece of information which shows that a chemical
reaction had taken place.
(b) Which of the chemicals mentioned is the precipitate?
Answers:(a) Solid being formed in the reaction when the chemicals
present in the two solutions react together.
(b) The barium sulphate is the precipitate. A precipitate is
an insoluble solid formed when two solutions are mixed.
Mixing solutions of barium chloride
and sodium sulphate
Units 1 and 2 Revision.
Q4. Write the symbol for each of the following elements.
(a) Potassium
(b) Phosphorus
(c) Sulphur
(d) Sodium
(e) Calcium
(f) Copper
Answers:(a) K
(b) P
(c) S
(d) Na
(e) Ca
(f) Cu
Q5. What are the names of the elements whose symbols are
shown below?
H
Li
He
Be
Na Mg
Sc Ti
V
K
Y
Zr
Nb Mo Tc
La
Hf
Tl
Ca
Rb Sr
Cr
W
Mn Fe
Co Ni
Cu Zn
Ru Rh Pd Ag
Rh Os Ir
Pt
Au
C
N
O
F
Ne
Al
Si
P
S
Cl
Ar
Se Br
Kr
Cd
Ga Ge As
Hg
In
Sn Sb Te
Tl
Pb Bi
Cs Ba
Fr
B
Po At
Ra
Ce Pr
Nd Pm Sm Eu Gd Tb
Th
Pa U
La
Hf
Tl
Dy Ho Er
Np Pu Am Cm Bk Cf
Rh
W Rh Os Ir Pt Au
I
Tm Yb Lu
(a) Zn
(b) O
(c) F
(d) He
(e) Fe
(f) Cr
Xe
Rn
Answers:-
Es Fm Md No Lr
Hg Ga Ge As
Se
Use your data booklet.
(a) Zinc
(b) Oxygen
(c) Fluorine
(d) Helium
(e) Iron
(f) Chromium
Units 1 and 2 Revision.
Q6. Name the elements present in the following compounds.
(a) Lead sulphide
(b) Calcium carbide
(c) Copper sulphate
(d) Sodium hydrogencarbonate.
Answers:(a) Lead and sulphur
(b) Calcium and carbon
(c) Copper, sulphur and oxygen (d) Sodium, hydrogen, carbon
and oxygen
Q7. Name the compounds which contain the following
elements.
(a) Oxygen and iron.
(b) Barium, oxygen and carbon
(c) Lead, nitrogen and oxygen (d) Chlorine and copper.
Answers:Standard Grade Chemistry
(a) Iron oxide
(b) Barium carbonate
(c) Lead nitrate
(d) Copper chloride
Units 1 and 2 Revision.
Q8. Use the word box below to answer the following
solute
dilute
solution
concentrated
solvent
saturated
(a) When sodium chloride is dissolved in water the water is
described as being the …………………
(b) When sodium chloride is dissolved in water the sodium
chloride is described as being the ………………….
(c) When no more sodium chloride will dissolve in water the
sodium chloride solution is said to be ……………………
(d) A solution which contains a lot of sodium chloride
dissolved in a small volume of water is said to be
…………………………
Answers:(a) solute
(b) solvent
(d) concentrated
Standard Grade Chemistry
(c) saturated
Units 1 and 2 Revision.
Q9.
(a) Identify the two experiments which can be used to investigate the
effect of concentration on the rate of the reaction.
(b) Identify the experiment with the fastest reaction rate.
Answers
(a) C and D.
Standard Grade Chemistry
(b) F
Units 1 and 2 Revision.
Q10. Matthew added manganese dioxide to hydrogen peroxide solution,
oxygen was produced. Manganese dioxide is a catalyst.
(a) What is the purpose of a catalyst?
(b) What will be the mass of the manganese dioxide at the end
of the reaction?
(c) What would happen to the rate at which oxygen gas is given off
if the temperature was raised to 35oC?
Answers: (a) A catalyst speeds up a reaction.
(b) 0.1 g (A catalyst is not used up in a reaction).
Standard Grade Chemistry
(c) The rate of oxygen gas production will increase.
Units 1 and 2 Revision.
Q11. Zinc reacts with dilute sulphuric acid.
Identify the two factor which will speed up the reaction.
A
B
C
D
E
Using a larger volume of acid
Diluting the acid with water
Using a larger beaker
Heating the acid
Using a catalyst
Answers:- D and E.
Standard Grade Chemistry
Units 1 and 2 Revision.
Complete the following sentences.
1. All chemical reactions involve the formation
new
of one, or more ………………
substances.
2. Everything in the world is made from about
100
…………….
elements.
3. When elements join together they form
compounds
…………………………..
4. A mixture is formed when two, or more,
not react.
substances come together but do ……
Standard Grade Chemistry
Units 1 and 2 Revision.
Complete the following sentences.
Increasing
1. ……………….
the temperature will speed
up a reaction.
2. Changing from a lump to a powder increases
surface
area
the ……………….
……………….
of a solid
speeds …………
up a reaction.
and …………..
more
3. 2 mol/l acid is …………….
concentrated
than 1 mol/l acid. The more concentrated
quickly
acid reacts more …………………
with
marble chips than the dilute acid.
Standard Grade Chemistry