SOCIAL
AWARENESS ORGANIZATION (SAO)
EXTRA
STUDIES DEPARTMENT
URBAN
WEST ZONE EXAMINATION SYNDICATE
FORM
FOUR MOCK EXAMINATION
032/1 CHEMISTRY
1
(For both School and Private Candidates)
Time:
3 Hours Thursday, 10th July 2014a.m.
Instructions
1.
This paper consists of
section A, B, and C.
2.
Answer all questions from each section.
3.
Calculators and
cellular phones are not allowed in the examination room.
4.
Write your examination
Number on every page of your answer booklet(s).
5.
The following constants
may be used where necessary.
Atomic
masses
H
= 1, C = 12, N = 14, O = 16, Na = 23, S = 32, Cl = 35.5, Mg = 24,
G.M.V
at S.T.P = 22.4dm3/mole = 22400cm3/mole.
1Faraday
= 96500C
Avogadro’s
constant = 6.2×1023 particle/mole.
SECTION A (20Marks)
Answer
all questions in this section
1. For
each of the items (i) – (x), choose the correct answer from the given
alternatives and write its letter beside the item number.
(i)
Chemistry is a study of
A. The
composition, structure and properties of matter
B. All
scientific process
C. Experiment
carried out in industries
D. Chemicals
used in laboratory
E. Physical
process
(ii) A
Bunsen burner produces the hottest flame when
A. The
air holes are closed D. The air holes are half opened
B. The
air holes are fully opened E. Completely closed
C. The
gas tap is opened at 450 clockwise
(iii) ______
is the second step in the scientific procedures
A. Data
analysis D. Observation
B. Hypothesis E. Data interpretation
C. Conclusion
(iv) The
process by which a substance changes directly from solid to gaseous state
without passing the liquid state is called
A. Melting D. Freezing
B. Boiling E. Sublimation
C. Evaporation
(v)
Syrups are example of
A.
Solution D. Mixture
B.
Filtrates E. Residue
C.
Suspensions
(vi) A
rapid chemical reaction that release energy in the form of light and heat is
called
A.
Combustion D. Heating
B.
Ignition E. Fire
C.
A reactant
(vii) _____
is the common method used for producing hydrogen industrially
A. Electrodes D. Steam reforming
B. Reduction E. Oxidation
C. Decomposition
(viii) Fresh
water constitutes about _____% of total water on the earth
A.
30 D. 0.3
B.
13 E. 3
C.
97
(ix)
What is nucleus?
A. Neutrons D. Electrons
B. Protons E. Proton and neutron
C. Proton
and electron
(x)
______ is an example of triprotonic acid
A. H2SO4 D. CH3COOH
B. HCL E. HNO3
C. H3PO4
2.
Match the items in List
A with the responses in List B by writing the letter of the responses beside
the item number
|
List A
|
List B
|
|
(i)
Gram molar volume of
gas
(ii)
Standardization
(iii)
Electroplating
(iv)
Chemical equilibrium
(v)
Water gas
(vi)
Gangue
(vii)
Basic metal oxides
(viii) Insoluble
amorphous sulphur
(ix)
Still
(x)
Soil formation
|
A.
Weathering process
B.
Weather agent
C.
Fractional
distillation
D.
Simple distillation
E.
Flower of sulphur
F.
Rhombic sulphur
G.
Group I metal oxide
H.
Group II metal oxide
I.
Unvalued ores
J.
Valued ores
K.
Co(g) + H2(g)
L.
Co(g) + N2(g)
M.
Stability of
reactants and products
N.
Rate of reaction
O.
Coating of one metal
by another during electrolysis process
P.
Purification
Q.
Titration
R.
Pipetting
S.
22400cm3/mole
T.
1 liter/mole
|
SECTION B (54 Marks)
Answer all
questions in this section
3. (a) Define the following terms
(i)
Fire
(ii) Fire
fighting
(b) Name four (4) main parts made up
hydrological cycle
4. (a) What do you understand by the term dilution?
(b) What volume of commercial acid of 38% and
density 1.18g/cm3 of Hydrochloric acid should be diluted to make
0.1M solution of 2litres?
5. (a) Name the following compound
(i)
Cu3P2
(ii) N2O5
(b) Element
Z has atomic number of 10, whose isotopes A, B and C have atomic masses of 20,
21 and 22 in proportion of 90.8%, 0.3 and 9.2% respectively. Calculate the
relative molecular mass of Z and write its electronic configuration and name
6. (a) In considering periodic table, explain
briefly how Electro negativity, Ionization energy and Atomic radius of element
vary, across the groups and down the groups.
(b) Write the net ionic equation for the
reaction of aqueous Potassium thiosulphate and Nitric acid.
7. (a) With the aid of chemical reaction, briefly
explain why Ammonia dried by quick lime (Ca(OH)2) whiles the common
drying agent such as concentrated sulphuric acid and calcium chloride are not
used.
(b) The reaction below shows a reaction between
fluorine gas and sodium chloride. What is type of reaction? Why is it possible
to take place?
F2(g)
+
2NaCl(aq) 2NaF(aq) + Cl2(g)
8. (a) Give the difference between physical
strength and chemical strength of metal
(b) In conversion
process of copper extraction. Copper (I) oxide is reduced by copper (I)
sulphide to copper as self reduction. Why is it possible?
9. (a) Define the term pollution
(b) Name four (4) gases that contribute to
global warming and one source of each.
10. (a) Explain in brief why brown ring formed on
Nitrate test disappears when disturbed while it is reversible?
(b) Why dry quenching is more favored than wet
quenching of coke?
11. (a) Why most organic compounds have the same
product in the combustion reactions?
(b) List down any four (4) causes of soil
erosion.
SECTION
C (26 Marks)
Answer all questions in this section
12. “Electrolysis
of Dilute Sulphuric acid is called the electrolysis of water”. By using well
labeled diagram of Hoff – man apparatus and electrode reactions, give reasons
for the validity of this statement.
13. Mostly
one organic compound is the derivative of the others. Verify this statement by
using chemical reaction for the conversion of the following compounds.
Alcanoic acid Alkane Alkene Alkyne
Alkanol
