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Chemistry UTME / JAMB 1983 Organic Chemistry I: Hydrocarbons & Crude Oil
Crude petroleum pollutant usually seen on some Nigerian creeks and waterways can be dispersed or removed by
A
heating the affected parts in order to boil off the petroleum
B
mechanically stirring to dissolve the petroleum in water
C
pouring organic solvents to dissolve the petroleum
D
spraying the water with detergents
E
cooling to freeze out the petroleum
medium Difficulty
Chemistry UTME / JAMB 1983 Chemical Bonding & Intermolecular Forces
An element is electronegative if
A
it has a tendency to exist in the gaseous from
B
its ions dissolve readily in water
C
it has a tendency to lose electrons
D
it has a tendency to gain electrons
E
it readily froms covalent bonds
medium Difficulty
Chemistry UTME / JAMB 1983 Stoichiometry, Mole Concept & Volumetric Analysis
Solutions X, Y, and Z have PH values 3.0. 5. 0 and 9. 0 respectively. Which of the following statements is correct?
A
All the solutions are acidic
B
All the solutions are basic
C
Y and Z are more acidic than water
D
Y is more acidic than X
E
Z is the least acidic
medium Difficulty
Chemistry UTME / JAMB 1983 Stoichiometry, Mole Concept & Volumetric Analysis
In the reactions (I) H2 (g) + 1/2O2(g) → H2O(l); ∆H = -286 KJ (II) C(s) + O2g) → CO2 (g); ∆H = -406 KJ the equations imply that
A
more heat is absorbed in (l)
B
more heat is absorbed in (ll)
C
less heat is evolved in (l)
D
reaction (ll) proceeds faster than (l)
E
reaction (l) proceeds faster than (ll)
medium Difficulty
Chemistry UTME / JAMB 1983 Stoichiometry, Mole Concept & Volumetric Analysis
Which of these metals, Mg, Fe, Pb and Cu will dissolve in dilute HCI?
A
All the metals
B
Mg ,Fe and Cu
C
Mg, Fe and Pb
D
Mg and Fe only
E
Mg only
medium Difficulty
Chemistry UTME / JAMB 1983 Organic Chemistry I: Hydrocarbons & Crude Oil
The correct name of the compound with the above structural formula is
Attached Figure / Diagram
Question diagram
A
2-methylbut -1-ene
B
2-methylbut -2-ene
C
2-methylbutane
D
2-ethylprop-1 -ene
E
2-ethylprop-2-ene
medium Difficulty
Chemistry UTME / JAMB 1983 Stoichiometry, Mole Concept & Volumetric Analysis
How many isomeric forms are there for the molecular formula C3H6Br2?
A
1
B
2
C
3
D
4
E
5
medium Difficulty
Chemistry UTME / JAMB 1983 Non-Metals & Their Compounds
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
A
sulphur (VI) trioxide
B
tetraoxosulphate (VI) acid
C
trioxosulphate (IV) acid
D
dioxosulphate (II) acid
E
hydrogen sulphide
medium Difficulty
Chemistry UTME / JAMB 1983 Water, Solutions & Solubility
Sodium sulphate decahydrate (Na2SO4.10 H2O) on exposure to air loses all its water of crystallization. The process of loss is known as
A
efflorescence
B
hygroscopy
C
deliquescence
D
effervescence
E
dehydration
medium Difficulty
Chemistry UTME / JAMB 1983 Electrolysis & Electrochemical Cells
Which of the following happens during the electrolysis of molten sodium chloride?
A
Sodium ion loses an electron
B
Chlorine atom gains an electron
C
Chlorine ion gains an electron
D
Sodium ion is oxidized
E
Chloride ion is oxidized
medium Difficulty
Chemistry UTME / JAMB 1983 Metals, Transition Elements & Extraction
Stainless steel is an alloy of
A
carbon, iron and lead
B
carbon, iron and chromium
C
carbon, iron and copper
D
carbon, iron and silver
E
carbon and iron only
medium Difficulty
Chemistry UTME / JAMB 1983 Stoichiometry, Mole Concept & Volumetric Analysis
Which volume of 0.5 M H 2SO4 will exactly neutralize 20 cm 3 of 0.1 M NaOH solution?
A
2.0 cm 3
B
5.0 cm 3
C
6.8 cm 3
D
8.3 cm 3
E
10.4 cm 3
medium Difficulty
Chemistry UTME / JAMB 1983 Stoichiometry, Mole Concept & Volumetric Analysis
Which of the following pair of gases will NOT react further with oxygen at a temperature between 30oC AND 400oC
A
SO2 and NH3
B
CO2 and H2
C
NO2 and SO3
D
SO3 and NO
E
CO and H2
medium Difficulty
Chemistry UTME / JAMB 1983 Electrolysis & Electrochemical Cells
Some metals are extracted from their ores after some preliminary treatments by electrolysis (L), some by thermal decomposition(T), some by a combination of both processes (TL). Which set-up in the following for the extraction of iron, copper, and aluminium is correct?
A
lron (L), copper (L) aluminium (T)
B
lron (T) copper (L) aluminium (T)
C
lron (TL) copper (TL) aluminium (TL)
D
Iron (L) copper (T) aluminium (T)
E
lron (T) copper (L), aluminium (TL)
medium Difficulty
Chemistry UTME / JAMB 1983 Nature of Matter & Separation Techniques
In the preparation of some pure crystals of Cu (NO3)2 starting with CuO, a student gave the following statements as steps he employed. Which of these shows a flaw in his report ?
A
some CuO was reacted with excess dilute H2SO4
B
the solution was concentrated
C
when the concentrate was cooled, crystals formed were removed by filtration
D
the crystals were washed with very little cold water
E
the crystals were then allowed to dry
medium Difficulty
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