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Chemistry NECO SSCE 2008 Acids, Bases, pH & Salts
What is the colour of phenolphthalein indicator in a basic medium?
A
Blue
B
Colourless
C
Orange
D
Pink
E
Yellow
medium Difficulty
Chemistry NECO SSCE 2008 Reaction Rates & Chemical Equilibrium
Which of the following will Increase the rate of reaction of Chips of a metal M as shown in the equation below? M(s)+2HC1(aq) → MCI2 (aq) + H2(g)
A
Adding some distilled water
B
Decreasing the temperature
C
Diluting the hydrochloric acid
D
Grinding the metal into powder
E
Increasing the pressure
medium Difficulty
Chemistry NECO SSCE 2008 Stoichiometry, Mole Concept & Volumetric Analysis
Which of the following is a component of the car exhaust?
A
Aluminium
B
Calcium
C
Iron
D
Zinc
E
Lead
medium Difficulty
Chemistry NECO SSCE 2008 Stoichiometry, Mole Concept & Volumetric Analysis
The molecular formula of ethylbutanoate is?
A
CH5COOC26
B
C3HCOOC2H7
C
C3H7COOC3H7
D
C3H7COOC4H9
E
C3H7COOC2H5
medium Difficulty
Chemistry NECO SSCE 2008 Reaction Rates & Chemical Equilibrium
The rate of a chemical reaction is NOT affected by one of these factors
A
colour
B
concentration
C
presence of light
D
surface area
E
temperature
medium Difficulty
Chemistry NECO SSCE 2008 Stoichiometry, Mole Concept & Volumetric Analysis
Pipe-borne water is usually chlorinated in order to
A
coagulate sediments in the water
B
improve taste of the water
C
kill harmful bacteria in the water
D
make it pure
E
remove the hardness in the water
medium Difficulty
Chemistry NECO SSCE 2008 Stoichiometry, Mole Concept & Volumetric Analysis
The planet with the highest number of moon is
A
Earth
B
Jupiter
C
Uranus
D
Pluto
E
Venus.
medium Difficulty
Chemistry NECO SSCE 2008 Electrolysis & Electrochemical Cells
If two metallic ions of the same concentration migrate to a graphite cathode, the one that would be preferentially discharged is that with the
A
greater stability in solution
B
lower electrical charge
C
smaller mass
D
stronger tendency to accept electrons
E
stronger tendency to lose electrons.
medium Difficulty
Chemistry NECO SSCE 2008 Stoichiometry, Mole Concept & Volumetric Analysis
A device used in the laboratory for intermittent production of gases without heating is
A
aspirator
B
delivery tube
C
fume cupboard
D
kipp’s apparatus
E
muller counter
medium Difficulty
Chemistry NECO SSCE 2008 Chemical Bonding & Intermolecular Forces
What type of bond holds hydrogen fluoride molecules together when forming larger aggregate?
A
Covalent
B
Dative
C
Hydrogen
D
Ionic
E
Metallic
medium Difficulty
Chemistry NECO SSCE 2008 Stoichiometry, Mole Concept & Volumetric Analysis
The action of zinc on an acid produces
A
chlorine
B
hydrogen
C
nitrogen
D
sulphur
E
water vapour.
medium Difficulty
Chemistry NECO SSCE 2008 Stoichiometry, Mole Concept & Volumetric Analysis
A solution is prepared by dissolving I .96g of H2SO4 in 250 cm3 of its solution. What is the concentration in moles per dm3?
A
0.008
B
0.08
C
0.1
D
0.8
E
8.02
medium Difficulty
Chemistry NECO SSCE 2008 Organic Chemistry I: Hydrocarbons & Crude Oil
Which of the following compounds is unsaturated?
A
Cyclohexane
B
Methoxyethane
C
1 ,2-dibromoethane
D
2,2,3-trimethylpentane
E
3-methylbut-l-ene
medium Difficulty
Chemistry NECO SSCE 2008 Stoichiometry, Mole Concept & Volumetric Analysis
pH is define as
A
[H+]
B
–log [H]
C
–log [H+]
D
log [H]
E
log [H+]
medium Difficulty
Chemistry NECO SSCE 2008 Particulate Nature of Matter, Laws & Formulae
Matter is neither created nor destroyed in the course of any chemical reactions is a statement of the law of
A
combining volumes
B
conservation of mass
C
definite proportion
D
multiple proportion
E
reciprocal proportion.
medium Difficulty
Page 875 of 1989