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When air is passed through a heated tube containing finely divided copper, the component that is absorbed in the process is
Acarbon (IV) oxide
Bnitrogen
Coxygen
Dwater vapour
Enoble gases
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Question 1772
waec1991
The separation of a mixture of calcium trioxocarbonate (lV) and sodium trioxocarbonate (IV) is most easily carried out by using the differences in their
Aphysical states
Bmelting points
CRf. values
Dsolubility
Eboiling points
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Question 1773
waec1991
In which of the following is the oxidation number of nitrogen zero?
ASO2 and NH3
BNaNO3
CHNO2
DNOI3
EN2
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Question 1774
waec1991
The metal extracted from cassiterite is
Acalcium
Bcopper
Ctin
Dsodium
Elead
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Question 1775
jamb1991
The appropriate test paper to use in the above experiment is moist
Alitmus psper
Bpotassium heptaoxodichromate (IV) paper
Clead (ll) trioxonitrate (V) paper
Duniversal indicator paper
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Question 1776
jamb1991
The data in the table above shows the rate of reaction of nitrogen (ll) oxide with chlorine at 25oC It can be concluded that doubling the initial concentration of NO increase the rate of reaction by a factor of
Atwo
Bthree
Cfour
Dfive
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Question 1777
jamb1991
50 cm3 of sulphur (lV) oxide, 800 cm3 of carbon (IV) oxide will respectively saturate 1.0cm3 of water at 15oC. Which of the following is suitable for demonstrating the fountain experiment?
ASulphur (IV) oxide and hydrogen chloride.
BCarbon (IV) oxide and ammonia
CAmmonia and hydrogen chloride
DCarbon (IV) oxide and Sulphur (IV) oxide
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Question 1778
jamb1991
The electrons of two atoms Y and Z are arranged in shells as shown above. The bond formed between the atoms of Y and Z is
Aionic
Bcovalent
Cdative
Dmetallic
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Question 1779
jamb1991
Which of these is an acid salt?
AK2SO4-.AI2(SO4)3.24H2O
BCuCO3.Cu(OH)2
CNaHS
DCaOCI2-
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Question 1780
jamb1991
Which of the following are the products of the reaction between CH3COOH and CI2 in sunlight?
ACICH2COOH + HCI
BCH3COCI + HOCI
CCH3COOCI + HCI
DCH3COCI + HO2
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Question 1781
jamb1991
Which of the following statements is TRUE of the complete hydrolysis of a glycerine by sodium hygroxide?
A3 moles ofNaOH are required for each mole of glyceride
B3 moles of glycerol are produced
COnly one mole of soap is formed
Dconcentrated H2SO4 is essential for the completion of the reaction
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Question 1782
jamb1991
Is known as?
A1-chloro-2-methylbutane
B1-chloro-2-methylpropane
C2-chloromethylpropane
D1-chloro-2, 2-dimethylethane
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Question 1783
jamb1991
A certain liquid has a high boiling point. It is viscous, non-toxic, miscible with water being very hygroscopic. This liquid is most likely to be?
ACH3CH2CH2HO
BCH3CHOHCH3
CCH3CH2CHOHCH3
DCH2OHCHOHCH2OH
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Question 1784
jamb1991
One advantages of detergents over soap is that detergents?
Aare easier to maufacture
Bfoam more than soap
Cform soluble salts with hard water
Dare able to deter germs more than soap
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Question 1785
jamb1991
Ethene when passed into concentrated H2SO4 is rapidly absorbed. The product is diluted with water and then warmed to produce?
Aethanol
Bdiethyl ether
Cethanal
Ddiethyl sulphate
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Question 1786
jamb1991
How many grams of bromine will be required to completely react with 10 g of propyne?
(C = 12, H = 1, Br = 80)
A20 g
B40 g
C60 g
D80 g
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Question 1787
jamb1991
Which of the following compounds can exist as geometric isomers?
A2-methylbut-2ene
BBut-2-ene
CBut-1-ene
DCI-C-Br
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Question 1788
jamb1991
Copper (II) tetraoxosulphate (IV) is widely used as a?
Afertilizer
Bfungicide
Cdisinfectant
Dpurifier
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Question 1789
jamb1991
Which of the following metals can be prepared in samples by the thermal decomposition of their trioxonitrate (V) salts?
ACopper and mercury
BSilver and copper
CMercury and silver
DMagnesium and mercury
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Question 1790
jamb1991
Which of the following, in clear solution, forms a white precipitate when carbon (IV) oxide is bubbled into it for a short time?
