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Chemistry UTME / JAMB 1981 Water, Solutions & Solubility
In the preparation of ammonia, which of the following is used as the drying agent?
A
CaO
B
CaCI2
C
Conc. H2SO4
D
P2O5
E
H3PO4
medium Difficulty
Chemistry UTME / JAMB 1981 Organic Chemistry II: Functional Groups, Polymers & Biomolecules
A polymerization reaction is one in which?
A
small molecules form giant molecules
B
atoms form molecules
C
giant molecules form small molecules
D
molecules form volatile compounds
E
a molecule rearranges itself
medium Difficulty
Chemistry UTME / JAMB 1981 Atomic Structure, Orbitals & Nuclear Chemistry
Which of the following is the electronic configuration of sodium? (Atomic number of Na = 11)
A
1s2 2s22p6 3s2
B
1s2 2s22p6 3s2 3p1s2 2s22p6 3s1
C
1s2 2s22p6 3s1
D
1s2 2s22p6 3s°
E
1s2 2s22p6 4s1
medium Difficulty
Chemistry UTME / JAMB 1981 Kinetic Theory of Matter & Gas Laws
Na2CO3 + 2HCI → 2NaCI + H2O + CO2. Using the above equation, what volume of carbondioxide, measured at s.t.p is liberated when 53g of sodium carbonate is dissolved in hydrochloric acid? (1 mole of gas occupies 22.4 dm3 at s.t.p) (Na = 23, C = 12, O = 16)
A
44.8 dm3
B
11.2 dm3
C
100.1 dm3
D
3.0 dm3
E
22.4 dm3
medium Difficulty
Chemistry UTME / JAMB 1981 Chemical Energetics & Thermochemistry
When sodium nitrate dissolves in water, ∆H is positive. This means that?
A
the reaction is catalysed
B
the reaction is complete
C
the reaction is exothermic
D
the reaction is endthermic
E
sodium nitrate is highly soluble in water
medium Difficulty
Chemistry UTME / JAMB 1981 Organic Chemistry I: Hydrocarbons & Crude Oil
If an organic compound decolorizes bromine water then the compound is?
A
saturated
B
supersaturated
C
unsaturated
D
a solid
E
protonated
medium Difficulty
Chemistry UTME / JAMB 1981 Organic Chemistry II: Functional Groups, Polymers & Biomolecules
Fats and oils are?
A
addition products of long chain fatty acids and alkali
B
addition products of long-chain fattyy acids and glycerol
C
condensation products of long-chain fatty acids and glycerol
D
condensation products of formaldehyde and glycerol
E
liquids at 20°C
medium Difficulty
Chemistry UTME / JAMB 1981 Non-Metals & Their Compounds
Which of the following statements about phosphorus is NOT correct?
A
Phosphorus is a solid mineral
B
Phosphorus is obtained by oxidation reaction of phosphate
C
Phosphorus exists in two allotropic forms
D
Both forms of phosphorus are interconvertible
E
Yellow phosporus ignites when rubbed on a rough surface
medium Difficulty
Chemistry UTME / JAMB 1981 Stoichiometry, Mole Concept & Volumetric Analysis
28.8 cm3 of nitrogen at 15°C is cooled to O°C at constant pressure, the new volume of nitrogen is?
A
17.4 cm3
B
14.7 cm3
C
27.3 cm3
D
31.7 cm3
medium Difficulty
Chemistry UTME / JAMB 1981 Electrolysis & Electrochemical Cells
If 48,000 coulombs of electricity are required to discharge 0.5 mole of sodium from a molten sodium chloride mass, then the number of coulombs required to discharge 2 moles of lead from molten lead (ll) chloride is?
A
48,000
B
96,000
C
192,000
D
384,000
E
576,000
medium Difficulty
Chemistry UTME / JAMB 1981 Stoichiometry, Mole Concept & Volumetric Analysis
The following compounds are given with their corresponding boiling points. Compound Boiling Point i.................................14°C ii................................24°C iii................................0°C iv................................120°C V.................................-2°C From the above information, indicate which of the following is correct?
A
All the compounds are gaseous at 20 °C
B
One of the compounds is gaseous at 20 °C
C
Two of the compounds are gaseous at 20 °C
D
Three of the compounds are gaseous at 20 °C
E
None of the compounds is gaseous at 20 °C
medium Difficulty
Chemistry UTME / JAMB 1981 Stoichiometry, Mole Concept & Volumetric Analysis
The products of the reaction between dilute sulphuric acid and sodium thiosulphate crystals are?
A
Na2SO4 + SO2 + O2 + H2O
B
Na2SO3 + SO3 + O2 + H2O
C
Na2SO4 + SO2 + S + H2O
D
Na2SO4 + SO3 + S + H2O
E
Na2SO4 + SO2 + H2O only
medium Difficulty
Chemistry UTME / JAMB 1981 Kinetic Theory of Matter & Gas Laws
Which of the following is NOT a true statement of the kinetic Theory of Gases?
A
The molecules move at random
B
The size of molecules is negligble as compared with the volume of gas
C
The molecular collisions are perfectly elastic
D
Every molecule has the same kinetic energy at a particular temperature
E
The average kinetic energy is proportional to the absolute temperature of the gas
medium Difficulty
Chemistry UTME / JAMB 1981 Atomic Structure, Orbitals & Nuclear Chemistry
The electronic configuration of elements X and Y are X = 2, 8, 6; Y = 2, 8, 7. The bond in the compound formed by X and Y is expected to be?
A
ionic
B
covalent
C
dative covalent
D
metallic
E
none of the above
medium Difficulty
Chemistry UTME / JAMB 1981 Water, Solutions & Solubility
5cm3 of a saturated solution of sodium chloride at 30°C gave, on careful evaporation, 1.95g of solid salt. The solubility of sodium chloride at 30°C? (Na = 23, Cl = 35.5)
A
5.00 mole dm3
B
5.67 mole dm3
C
6.00 mole dm3
D
6.67 mole dm3
E
7.00 mole dm3
medium Difficulty
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