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The final product of the reaction of ethyne with hydrogen iodide is?
ACH3—CHI2
BCH2l—CH2I
CCH3—CI3
DCH2 = CHI
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Question 32
jamb1997
The reaction of an alkanol with an alkanoic acid in the presence of concentrated H2SO4 will produce an?
Aalkanal
Balkanoate
Calkanone
Dalkyne
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Question 33
jamb1997
An undesirable paraffin in the petroleum industry which is particularly prone to knocking is?
Aiso-octane
Bn-heptane
Ciso-heptane
Dn-octane
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Question 34
jamb1997
A sample of a substance containing only C and H burns in excess O2 to yield 4.4g of CO2
and 2.7 g of H2O. The empirical formula of a substance is?
(C = 12, O = 16, H = 1)
ACH3
BCH2
CCH4
DC2H24
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Question 35
jamb1997
Sodium hydroxide is prepared commercially from sodium chloride solution by?
Aelectrolysis using mercury as cathode
Bhydrolysis in steam using a catalyst
Celectrolysis using iron as anode
Dtreating sodium chloride with ammonia and carbon (IV) oxide
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Question 36
jamb1997
Which of the additives could improve the quality of steel?
ASilicon
BSulphur and phosphorus
CCarbon
DChromium and nickel
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Question 37
jamb1997
The removal of rust from iron by treatment with tetraoxosulphate (IV) acid is based on the?
Ahydrolysis of the iron
Breaction of acid with base
Coxidationof the rust
Ddehydration of the iron
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Question 38
jamb1997
2X(aq) + MnO2(s) + 4H+(aq) → X2(g) + Mn2+(aq) + 2H2O.
The reaction above can be used for the laboratory preparation of all halogens except fluorine because it is?
Aa poisionous gas
Ban oxidizing agent
Celectronegative in nature
Dhighly reactive
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Question 39
jamb1997
Coal gas is made up of carbon (II) oxide, hydrogen and?
Anitrogen
Bair
Cargon
Dmethane
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Question 40
jamb1997
A compound that will NOT produce oxygen on heating is?
Apotasium dioxonitrate (III)
Blead (IV) oxide
Cpotassium trioxochlorate (V)
Dpotassium trioxonitrate (V)
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Question 41
jamb1997
mE + nF → pG + qH. In the equation above, the equilibrium constant is given by?
A(E)m(F)n/ (G)n(H)q
B(E)(F) / (G)(H)
C(G)p(H)q / (E)m(F)n
D(G)(H) / (E)(F)
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Question 42
jamb1997
Oxidation of concentrated hydrochloric acid with manganese (IV) oxide liberates a gas used in the?
Amanufacture of tooth pastes
Btreatment of simple golitre
Cvulcanization of rubber
Dsterilization of water
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Question 43
jamb1997
One method of driving the position of equilibrium of an endothermic reaction forward is to?
Aincrease temperature at constant pressure
Bdcrease pressure at constant temperature
Ccool down the apparatus with water
Ddecreases temperature at constant pressure
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Question 44
jamb1997
If the rate law obtained for a given reaction is rate = k(X)n (Y)m, what is the overall order of the reaction?
Anm
Bn/m
Cn + m
Dn - m
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Question 45
jamb1997
2SO2(g) + O2(g) → 2SO3. In the reaction above, the standard heats of formation of SO2(g) and SO3(g) are -297 KJ mol-1 and -396 kJ/mol respectively. The heat change of the reaction is?
A-99 kJ mol-
B-198 kJ mol-
C+198 kJ mol-
D+683kJ mol-
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Question 46
jamb1997
2H2S(g) + SO2(g) + H2O(I) → 3S(s) + 3H2O(I)..........(i) 3CuO(s) + 2NH3(g) → 3Cu(s) + 3H2O(I) + N2(g).........(II) In the equations above, the oxidizing agent (I) and the reducing agent in (II) respectively are?
AH2S and NH3
BSO2 and CuO
CSO2 and NH3
DH2S and CuO
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Question 47
jamb1997
What is the oxidation number of Z in K3ZCl6?
A-3
B+3
C-6
D+6
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Question 48
jamb1997
How many Faraday of electricity are required to deposit 0.20 mole of nickel, if 0.10 Faraday of electricity deposited 2.98g of nickel during electrolysis of its aqueous solution?
(Ni = 58.7, 1F = 96 500 C mol-)
A0.20
B0.30
C0.40
D0.50
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Question 49
jamb1997
When platinum electrodes are used during the electrolysis of copper (ll) tetraoxosulphate (lV) solution, the solution gets progressively?
Aacidic
Bbasic
Cneutral
Damphoteric
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Question 50
jamb1997
Given that 15.00 cm3 of H2
SO4 was required to completely neutralize 25.00 cm3 of 0.125 mol dm-3 NaOH, calculate the molar concentration of the acid solution:
