The following equations represent redox reactions EXCEPT
Ba2+(aq) + SO2-4 (aq) → BaSO4(s)
Cl2(g) + 2Br- (aq) → 2CI - (aq) + Br2(g)
Fe2+(aq) + ½ C I2(aq) → Fe3+ (aq) + CI-(aq)
2Fe3+(aq) + Sn2+(aq) → 2Fe2+(aq) Sn4+ (aq)
Zn(s) + CU2+(aq) → Zn2+(aq) + CU(s)
Correct answer is A
No explanation has been provided for this answer.
0.28
0.56
2.24
5.6
11.2
Correct answer is B
No explanation has been provided for this answer.
Brain tumors can be located by using an isotope of
carbon - 14
iodine 131
technetium 99
uranium235
uranium 238
Correct answer is C
No explanation has been provided for this answer.
During the extraction of iron in the blast furnance, slag is produced using
carbon
carbon
limestone
oxygen
sulphur
Correct answer is C
No explanation has been provided for this answer.
X = - log10 H+]
What does X stand for in the expression above?
Degree of acidity
Enthalpy change
Equilibrium constant
Ionic product of water
Solubility product
Correct answer is A
No explanation has been provided for this answer.
Which of the following gases is absorbed from the air dun photosynthesis?
Carbon (II) oxide
Carbon (IV) oxide
Nitrogen
Noble gases
Oxygen
Correct answer is B
No explanation has been provided for this answer.
All the following belong to the same family EXCEPT
glycerol
nylon
perspex polyethene
polyethene
polystyrene
Correct answer is A
No explanation has been provided for this answer.
Ptotal = P1 + P2 + P3 +…………. Pn, is an expression of law
Boyle’s
Charles’
Dalton’s
Graham’s
Gay Lussac’s
Correct answer is C
No explanation has been provided for this answer.
The following are ores of metals EXCEPT
bauxite
dolomite
graphite
haematite
magnetite
Correct answer is C
So Dolomite is a magnesium ore, haematite, and magnetite is an iron ore, Bauxite is an aluminum ore while graphite is not a metal ore but a crystalline allotrope form of carbon.
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