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Chemistry UTME / JAMB 2015 Oxidation, Reduction & Redox Reactions
\(Cu_2S_{(s)}+ O_{2(g)} = 2CU_{(s)} + SO_{2(g)}\). In the above reaction, the oxidation number of Cu changes from ___ to _______?
A
+1 to 0
B
0 to +2
C
+2 to +1
D
0 to +1
medium Difficulty
Chemistry UTME / JAMB 2015 Organic Chemistry I: Hydrocarbons & Crude Oil
The number of isomers formed by C6H14 is
A
4
B
5
C
2
D
3
medium Difficulty
Chemistry UTME / JAMB 2015 Stoichiometry, Mole Concept & Volumetric Analysis
The basic particles from which matter could be made up of are as follow, except?
A
Salt
B
Atom
C
Ion
D
Molecule
medium Difficulty
Chemistry UTME / JAMB 2015 Stoichiometry, Mole Concept & Volumetric Analysis
The energy value of petrol can be determined by
A
Bomb calorimeter
B
Catalytic cracker
C
Fractionating column
D
Thermometer
medium Difficulty
Chemistry UTME / JAMB 2015 Stoichiometry, Mole Concept & Volumetric Analysis
What volume of 0.5mldm3 H2SO4 will exactly neutralize 20cm3 of 0.1moldm3 NaOH Solution?
A
2.0cm3
B
5.0cm3
C
6.8cm3
D
8.3cm3
medium Difficulty
Chemistry UTME / JAMB 2015 Organic Chemistry II: Functional Groups, Polymers & Biomolecules
Detergents are manufactured with straight hydrocarbon chains, is to make them
A
soluble
B
biodegradable
C
cheaper
D
foamy
medium Difficulty
Chemistry UTME / JAMB 2015 Air & Environmental Chemistry
Which of the following results in the fall of acid rain?
A
oxide of lead
B
particulate matter
C
oxides of sulphur
D
gaseous hydrocarbon
medium Difficulty
Chemistry UTME / JAMB 2015 Water, Solutions & Solubility
The furring of kettles is caused by the presence of what compound in water?
A
calcium tetraoxosulphate (IV)
B
calcium hydrogentrioxocarbonate (IV)
C
calcium hydroxide
D
calcium trioxocarbonate (IV)
medium Difficulty
Chemistry UTME / JAMB 2015 Nature of Matter & Separation Techniques
A difference between chemical and physical change is that in a chemical change
A
oxygen is consumed
B
heat is supplied
C
the reversible process occurs
D
a new substance is formed
medium Difficulty
Chemistry UTME / JAMB 2015 Kinetic Theory of Matter & Gas Laws
According to the kinetic theory an absence in temperature causes the kinetic energy of particles to
A
decrease
B
increase
C
remain constant
D
be zero
medium Difficulty
Chemistry UTME / JAMB 2015 Stoichiometry, Mole Concept & Volumetric Analysis
PCL5(g)= PCL3(g) + Cl2(g) In the reaction above, a decrease in pressure will
A
Decelerate the reaction
B
Increase yield of Pcl3
C
Increase the yield of Pcl5
D
Accurate the reaction
medium Difficulty
Chemistry UTME / JAMB 2015 Stoichiometry, Mole Concept & Volumetric Analysis
Which of the following gives a precipitation when treated with NaOH Solution?
A
AlCl3
B
NH4Cl
C
Na2CO3
D
CH3COONa
medium Difficulty
Chemistry UTME / JAMB 2015 Atomic Structure, Orbitals & Nuclear Chemistry
Electronic configuration of an element 13 in the subsidiary energy level is
A
\( 1s^2 2s^2 2p^6 3s^2 3p^1 \)
B
\( 1s^22s^2 2p^4 3p^1 3s^1 \)
C
\( 1s^2 2s^2 2p^6 3s^2 3p^3 \)
D
\( 1s^1 2s^2 2p^6 3s^2 3p^4 \)
medium Difficulty
Chemistry UTME / JAMB 2015 Metals, Transition Elements & Extraction
Alloys are best prepared by
A
electroplating
B
Arc-welding
C
reducing and mixture of their metallic
D
cooking a molten of the metals
medium Difficulty
Chemistry UTME / JAMB 2015 Nature of Matter & Separation Techniques
In countries where the temperature fall below 273k, salt always spilled on the road in order to
A
increase the boiling point
B
increase the density of the ice
C
make the ice impure
D
reduce the freezing point of ice
medium Difficulty
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