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Solutions X, Y, and Z have PH values 3.0. 5. 0 and 9. 0 respectively. Which of the following statements is correct?
AAll the solutions are acidic
BAll the solutions are basic
CY and Z are more acidic than water
DY is more acidic than X
EZ is the least acidic
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Question 2022
jamb1983
An element is electronegative if
Ait has a tendency to exist in the gaseous from
Bits ions dissolve readily in water
Cit has a tendency to lose electrons
Dit has a tendency to gain electrons
Eit readily froms covalent bonds
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Question 2023
jamb1983
Crude petroleum pollutant usually seen on some Nigerian creeks and waterways can be dispersed or removed by
Aheating the affected parts in order to boil off the petroleum
Bmechanically stirring to dissolve the petroleum in water
Cpouring organic solvents to dissolve the petroleum
Dspraying the water with detergents
Ecooling to freeze out the petroleum
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Question 2024
jamb1983
Which of the following happens during the electrolysis of molten sodium chloride?
ASodium ion loses an electron
BChlorine atom gains an electron
CChlorine ion gains an electron
DSodium ion is oxidized
EChloride ion is oxidized
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Question 2025
jamb1983
Sodium sulphate decahydrate (Na2SO4.10 H2O) on exposure to air loses all its water of crystallization.
The process of loss is known as
Aefflorescence
Bhygroscopy
Cdeliquescence
Deffervescence
Edehydration
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Question 2026
jamb1983
A piece of burning sulphur will continue to burn in a gas jar of oxygen to give misty fumes which readily dissolved in water. The resulting liquid is
Asulphur (VI) trioxide
Btetraoxosulphate (VI) acid
Ctrioxosulphate (IV) acid
Ddioxosulphate (II) acid
Ehydrogen sulphide
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Question 2027
jamb1983
How many isomeric forms are there for the molecular formula C3H6Br2?
A1
B2
C3
D4
E5
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Question 2028
jamb1983
The correct name of the compound with the above structural formula is
A2-methylbut -1-ene
B2-methylbut -2-ene
C2-methylbutane
D2-ethylprop-1 -ene
E2-ethylprop-2-ene
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Question 2029
jamb1983
In the reaction Fe + Cu2+ \(\to\) Fe2+ + Cu,iron displaces copper ions to from copper. This is due to the fact that
Airn is in the metallic from while the copper is in the ionic from
Bthe atomic weight of copper is greater than that of iron
Ccopper is greater than iron
Dcopper metal has more electrons than iron metal
Eiron is higher in the electrochemical series than copper
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Question 2030
jamb1983
In which of the following processes is iron being oxidized?
1 Fe + H2SO4 → FeSO4 +H2
2 FeSO4 + H2S → FeS + H2SO4
3 2FeCI2 + Cl2 → 2FeCl3
4 2FeCl3 + SnCl2 + → 2FeCl2 + SnCl4
A1 only
B2 only
C3 only
D1 and 3
E2 and 4
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Question 2031
jamb1983
In the reaction M + N P;∆H = + QKJ. Which of the following would increase the concentration of the product?
ADecreaseing the concentration of N
BIncreasing the concentration of P
CAdding a suitable catalyst
DDecreasing the temperature
EIncreasing the temperature
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Question 2032
jamb1983
The colour imparted to a flame by calcuium ion is
Agreen
Bblue
Cbrick-red
Dyellow
Elilac
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Question 2033
jamb1983
Which of the following relationships between the pressure P, the volume V and the temperature T, represents an ideal gas behaviour?
AP \(\alpha\) VT
BP \(\alpha\) T/V
CPT \(\alpha\) V
DPV \(\alpha\) I/T
EP \(\alpha\) V/T
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Question 2034
jamb1983
A mixture of common salt, ammonium chloride and barium sulphate can best be separated by
Aaddition of water followed by filtration then sublimation
Baddition of water followed by sublimation then filtration
Csublimation followed by addition of water then filtration
Dfractional distillation
Efractional crystallization
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Question 2035
jamb1983
An unknown organic compound X has a relative molecular mass of 180. It is a colourless crystaline solid, readily soluble in water. X contains the elements C, H and O in the atomic ratio 1: 2:1. The compound has a sweet teste and melts on heating. In the presence of yeast and in the absence of air, X is converted to compound Y and a colourless gas. Compound Y reacts with sodium metal to produce a gas Z which gives a 'pop' sound with a glowing splint. Y also reacts with ethanoic acid to give a sweet smelling compound W.
Reaction of X with yeast forms the basis of the
Aplastic industry
Btextile industry
Cbrewing industry
Dsoap industry
Edyeing industry
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Question 2036
jamb1983
An unknown organic compound X has a relative molecular mass of 180. It is a colourless crystaline solid, readily soluble in water. X contains the elements C, H and O in the atomic ratio 1: 2:1. The compound has a sweet teste and melts on heating. In the presence of yeast and in the absence of air, X is converted to compound Y and a colourless gas. Compound Y reacts with sodium metal to produce a gas Z which gives a 'pop' sound with a glowing splint. Y also reacts with ethanoic acid to give a sweet smelling compound W.
The molecular formula of X is
AC12H22O11
BC6H12O6
CC3H6O 3
DC7H14O7
EC12H6O4
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Question 2037
jamb1983
An unknown organic compound X has a relative molecular mass of 180. It is a colourless crystaline solid, readily soluble in water. X contains the elements C, H and O in the atomic ratio 1: 2:1. The compound has a sweet teste and melts on heating. In the presence of yeast and in the absence of air, X is converted to compound Y and a colourless gas. Compound Y reacts with sodium metal to produce a gas Z which gives a 'pop' sound with a glowing splint. Y also reacts with ethanoic acid to give a sweet smelling compound W.
Compound W is
Aa soap
Ban oil
Can alkane
Dan ester
Esucrose
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Question 2038
jamb1983
The three-dimensional shape of methane is
Ahexagonal
Btrigonal
Clinear
Dtetrahedral
Ecubical
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Question 2039
jamb1983
Some copper (ll) sulphate pentahydrate (CuSO4 5H2O), was heated at 120 oC with the following results. Wt of crucible = 10.00 g; Wt of crucible + CuSO4 5H2O =14.98g; Wt of crucible + residue = 13.54 g. How many molecules of water of crystalization were lost?
[H = 1, Cu = 63.5, O = 16, S = 32]
A1
B2
C3
D4
E5
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Question 2040
jamb1983
If an element has the electronic configuration 1s 2 2s2 2p3 3s2 3p4, it is
