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.
Al and Mg
Zn and Fe
Zn and Pb
Pb and H
Au and Hg
Correct answer is A
The electrochemical series, also known as the activity series, is a list of metals listed in order of decreasing reactivity or in order of decreasing ease of oxidation.
Magnesium comes before Aluminium in the series
automobile exhaust and biological decomposition
combustion of coal and automobile exhaust
biological decomposition only
combustion of coal, automobile exhaust and biological decomposition
combustion of coal and biological decomposition
Correct answer is B
No explanation has been provided for this answer.
What is the formula of sodium gallate if gallium (Ga)shows an oxidation number of + 3?
NaGaO3
Na2Ga(OH)3
NaGa(OH)3
NaGa(OH)4
NaGaO
Correct answer is D
No explanation has been provided for this answer.
X + Y = Z is an equilibrium reaction. The addition of a catalyst?
increase the amount of Z produced in a given time
increases the rate of change in concentrations of X, Y and Z
increases the rate of disapearance of X and Y
increases the rate of the forward reaction
decreases the amounts of X and Y left after the attainment of equilibrium
Correct answer is B
No explanation has been provided for this answer.
60 cm3
10 cm3
40 cm3
30 cm3
70 cm3
Correct answer is A
No explanation has been provided for this answer.