Learn more about the properties, composition, and structure of substances (elements and compounds) with these Chemistry questions and answers. This Test can be used by students preparing for Chemistry in JAMB, WAEC, NECO or Post UTME.
The principle of column chromatography is based on the ability of the constituents to
move at different speeds in the column
dissolve in each other in the column
react with the solvent in the column
react with each other in the column
Correct answer is A
No explanation has been provided for this answer.
decreasing the pressure
decreasing the temperature
the addition of catalyst
increasing the temperature
Correct answer is B
No explanation has been provided for this answer.
Zn(s) + CuSO4(aq) \( \to \) ZnSO4(aq) + Cu(s)
In the reaction above, the oxidizing agent is
CuSO4(aq)
ZnSO4(aq)
Cu(s)
Zn(s)
Correct answer is A
No explanation has been provided for this answer.
The radioactive emission with the least ionization power is
\( \alpha - particles \)
X-rays
\( \gamma -rays \)
\( \beta - rays \)
Correct answer is C
No explanation has been provided for this answer.
How many unpaired electron are in the p-orbitals of a fluorine atom?
3
0
1
2
Correct answer is C
No explanation has been provided for this answer.
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.
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