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Chemistry UTME / JAMB 2015 Acids, Bases, and Salts
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 Matter & Separation Techniques
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 Acids, Bases, and Salts
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 Matter & Separation Techniques
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
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 Matter & Separation Techniques
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 and Periodic Table
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 Matter & Separation Techniques
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 Acids, Bases, and Salts
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
Chemistry UTME / JAMB 2015 Acids, Bases, and Salts
The substance that is used in the steel industry for the removal of carbon. Sulphur and phosphorus impurities from pig iron is
A
oxygen
B
chlorine
C
nitrogen
D
hydrogen
medium Difficulty
Chemistry UTME / JAMB 2015 Acids, Bases, and Salts
If glucose is heated with concentrated tetraoxosulphate(vi)acid, it will be dehydrated to?
A
carbon
B
carbon(iv)oxide
C
ethane
D
ethanol
medium Difficulty
Chemistry UTME / JAMB 2015 Stoichiometry & Mole Concept
Which of the following compounds can be represented by the molecular formula C2 H6O?
A
propanal
B
ethanol
C
methanoic acid
D
glucose
medium Difficulty
Chemistry UTME / JAMB 2015 Acids, Bases, and Salts
what is the pH of 0.00lmoldm3 solution of sodium hydroxide
A
14
B
13
C
12
D
11
medium Difficulty
Chemistry UTME / JAMB 2015 Stoichiometry & Mole Concept
N2O4(g)→ 2NO2(g) In the endothermic reaction above, more products formed will be favored by
A
A constant values
B
an increase in pressure
C
a decrease pressure
D
a decrease volume
medium Difficulty
Chemistry UTME / JAMB 2015 Matter & Separation Techniques
Chlorine gas turns damp starch-iodide paper
A
pink
B
colourless
C
red
D
dark blue
medium Difficulty
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