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In the diagram above , the activation energy for the backward reaction is
A+5kJ
B+15KJ
C+25KJ
D+30KJ
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Question 3
jamb1998
The diagram above represents an atom that can combine with chlorine to form
Aa covalent bond
Ban electrovalent bond
Ca hydrogen bond
Da co-ordinate bond
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Question 4
jamb1998
Which of the following is true concerning the properties of benzene and hexane?
ABoth undergo substitution reaction
BBoth undergo addition reaction
CBoth are solids
DBoth can decolourized bromine water
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Question 5
jamb1998
Terylene is synthesized from ethane- 1, 2-diol and benzene - 1, 4-dicarboxylic acid by?
Aaddition reaction
Bcondensation reaction
Celimination reaction
Dsubstitution reaction
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Question 6
jamb1998
An example of aromatic compound is?
AC6H13OH
BC6H13CI
CC6H5OH
DC6H14
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Question 7
jamb1998
How many structural isomers can be drawn for the non-cyclic alkanol with molecular formula C 4H10O?
A1
B2
C3
D4
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Question 8
jamb1998
On cracking medicinal paraffin, a gas is evolved which gives a pop sound with a lighted splinter and an oily liquid which decolourizes bromine solution is also obtained. The products of the cracking are ?
Acarbon (IV) oxide and alkyne
Bcarbon (ll) oxide and alkene
Chydrogen gas and alkene
Dhydrogen gas and alkane
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Question 9
jamb1998
One mole of hydrocarbon contains 6g of hydrogen. If the molecular weight is 54, the hydrocarbon is an?
Aalkanone
Balkane
Calkene
Dalkyne
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Question 10
jamb1998
Alloys are often used in preference to pure metals because?
Ametals are too hard
Bmerals are ductile
Cmetallic properties are improve in alloys
Dalloys are a mixture of metals
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Question 11
jamb1998
A common characteristic shared by iron and aluminium is that both?
Aare extracted by reduction methods
Bform only basic oxides
Cshow oxidation states of +2 and +3
Dform soluble hydroxides
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Question 12
jamb1998
The metal that will react with water only in the form of steam to librate hydrogen gas is?
Acalcium
Baluminium
Ciron
Dzinc
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Question 13
jamb1998
Which of the following is observed when a solution of iron (III) chloride is mixed with a solution of sodium hydroxide?
AA gas is evolved
BA deep blue precipitate is formed
CThe resultant solution turns green turns
DA brown precipitate is formed
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Question 14
jamb1998
The oxide that remains unchanged when heated in hydrogen is?
ACuO
BFe2O3
CPbO2
DZnO
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Question 15
jamb1998
A solution containing chloride ions gives white precipitate with silver trioxonitrate(V) Solution. The precipitate will be insoluble in dilute?
AHNO 3 but soluble in ammonia solution
BHNO3 and ammonia solution
CHCl but soluble in ammonia solution
DHCl and in ammonia solution
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Question 16
jamb1998
3CuO(s) + 2NH3(g) → 3Cu(s) + 3H2O(I) N2(g) (i).
2NH3(g) + 3Cl2(g) → 6HCl(g) + N2(g) (ii).
4NH3(g) + 3O2(g) → 6H2O(I) + 2N2(g) (iii).
The reactions represented by the equations above demonstrate the?
Abasic properties of ammonia
Bacidic properties of ammonia
Creducing properties of ammonia
Doxidizing properties of ammonia
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Question 17
jamb1998
A gas that turns a filter paper previously soaked in lead ethanoate solution black is?
Ahyrogen chloride
Bhydrogen sulphide
Csulphur (IV) oxide
Dsulphur (VI) oxide
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Question 18
jamb1998
2X(g) + Y(g) → Z(g): In the equation above, The rate of formation of Z is found to be independent of the concentration of Y and to quadruple when the concentration of X is doubled. The correct equation for the reaction is?
AR = k (X)(Y)
BR = K (X) ° (Y)
CR = K (X) ° (Y) 2
DR = K (X) 2(Y)°
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Question 19
jamb1998
2Cl2(g) + 2H2O(g) 4HCl(g) + O2(g)
∆H° = +115KJ mol-1. In the above equilibrium reaction, a decrease in temperature will?
Afavour the reverse reaction
Bfavour the forward reaction
Chave no effect on the equilibrium state
Ddouble the rate of the reverse raection
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Question 20
jamb1998
Mg2+(aq) + 2e->(aq) → Mg(s)E°(volts) = 2.370
Zn2+(aq) + 2e->(aq) → Zn(s)E°(volts) = -0.763
Cds2+(aq) + 2e->(aq) → Cd(s)E°(volts) = 0.403
Cu2+(aq) + 2e->(aq) → Cu(s)E°(volts) = 0.340
In the electrochemical series above, the strongest reducing agents is?
