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.
Cathodic protection of metals is based on
standard electrode potential of hydrogen
its electrical conductivity
nature of oxides formed
relative tendencies of oxidation
Correct answer is D
No explanation has been provided for this answer.
What is the relative molecular mass of the compound below? [H = 1.0; C = 12.0; O = 16.0]
137
136
64
59
Correct answer is B
The molecular formula of the compound in question is \(C_6H_5COOCH_3\)
Then its relative molecular mass = 8C + 8H + 2O = 8 X 12 + 8 x 1 + 2 X 16 = 136
C\(_{3}\)H\(_{6}\)
C\(_{4}\)H\(_{8}\)
C\(_{2}\)H\(_{4}\)
CH\(_{2}\)
Correct answer is B
No explanation has been provided for this answer.
Which of the following oxide causes acid rain?
CO
NO
H\(_{2}\)O\(_{2}\)
NO\(_{2}\)
Correct answer is D
Acid rain results when sulfur dioxide (SO2) and nitrogen oxides (NOX) are emitted into the atmosphere and transported by wind and air currents.
The SO2 and NOX react with water, oxygen and other chemicals to form sulfuric and nitric acids.
The hydrolysis of proteins by diluting mineral acids produces
sucrose
glucose
amino acids
fatty acids
Correct answer is C
No explanation has been provided for this answer.