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Chemistry NECO SSCE 2009 Stoichiometry, Mole Concept & Volumetric Analysis
Which of the following compounds will undergo thermal dissociation?
A
AgCl
B
CaCO3
C
K2S04
D
NaOH
E
NH4CI
medium Difficulty
Chemistry NECO SSCE 2009 Acids, Bases, pH & Salts
Which of the following gases will bleach moist litmus paper?
A
Cl2
B
CO2
C
HCl
D
N2O
E
SO3
medium Difficulty
Chemistry NECO SSCE 2009 Chemical Bonding & Intermolecular Forces
What kind of bond exist between carbon and oxygen in C03 2-?
A
Co- ordinate Covalent
B
covalent
C
Electrovalent
D
Metallic
E
Van der Waal forces
medium Difficulty
Chemistry NECO SSCE 2009 Periodic Table & Periodicity
Which of these compounds has the greatest ionic character?
A
AlF3
B
BF2
C
CF4
D
CsF
E
NaF
medium Difficulty
Chemistry NECO SSCE 2009 Atomic Structure, Orbitals & Nuclear Chemistry
\( ^{235}_{92}U + ^1_0n → ^{145}_{56}Ba + ^{88}_{36}Kr + 3^1_0n + Energy \) The equation above represent a/an
A
alpha particle emission
B
endothermic reaction
C
nuclear fission
D
nuclear fusion
E
thermal dissociation
medium Difficulty
Chemistry NECO SSCE 2009 Atomic Structure, Orbitals & Nuclear Chemistry
A neon atom is chemically nonreactive because
A
the electrons at the outermost shell is partially filled
B
the number of protons equals the number of electrons
C
the outer electron shell is completely filled
D
there are equal number of protons and neutrons in its nucleus
E
there are no elections at the outermost shell
medium Difficulty
Chemistry NECO SSCE 2009 Electrolysis & Electrochemical Cells
In the electrolysis of dilute tetraoxosulphate (VI) acid using platinum electrodes, the products obtained at the anode are cathode respectively are
A
hydrogen, oxygen
B
Hydrogen, tetraoxosulphate (VI) ion
C
oxygen, hydrogen
D
sulphur, hydrogen
E
sulphur, oxygen
medium Difficulty
Chemistry NECO SSCE 2009 Stoichiometry, Mole Concept & Volumetric Analysis
C\(_6\)H\(_{12}\)O\(_6\) What is the molar mass of the compound above? [ H=1, C=12, O=16 }
A
45
B
61
C
180
D
123
E
244
medium Difficulty
Chemistry NECO SSCE 2009 Kinetic Theory of Matter & Gas Laws
If the volume of a gas at 35^\circC is 60cm\(^3\), what would be its volume in cm\(^3\) at 273k?
A
39.03
B
46.81
C
53.18
D
67.69
E
76.92
medium Difficulty
Chemistry NECO SSCE 2009 Oxidation, Reduction & Redox Reactions
Sulphur has an oxidation number of +4 in
A
H2S
B
H2S04
C
MgSO4
D
Na2SO3
E
S03
medium Difficulty
Chemistry NECO SSCE 2009 Atomic Structure, Orbitals & Nuclear Chemistry
Atomic size decreases
A
across a period from left to right
B
across a period from right to left
C
diagonally down the group
D
down a group
E
with decrease in atomic number
medium Difficulty
Chemistry NECO SSCE 2009 Water, Solutions & Solubility
A salt which loses its mass when exposed to air is
A
deliquescent
B
effervescent
C
Efflorescent
D
fluorescent
E
hygroscopic
medium Difficulty
Chemistry NECO SSCE 2009 Periodic Table & Periodicity
When air is passed through alkaline pyrogallol and then lime water, the gases left are
A
nitrogen and carbon (IV) oxide
B
nitrogen and noble gases
C
nitrogen and oxygen
D
nitrogen, carbon (VI) oxide and noble gases
E
the noble gases
medium Difficulty
Chemistry NECO SSCE 2009 Stoichiometry, Mole Concept & Volumetric Analysis
How many zones are present in a luminous Bunsen burner flame?
A
2
B
3
C
4
D
5
E
6
medium Difficulty
Chemistry NECO SSCE 2009 Electrolysis & Electrochemical Cells
What mass of copper in gram would be deposited by a current of 1.00ampere passing for 965 seconds through copper(II) tertraoxosulphate (VI) solution? [Cu 63.5; If = 96500c]
A
0.32
B
0.64
C
3.18
D
6.35
E
9.65
medium Difficulty
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