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.
Sulphur has an oxidation number of +4 in
H2S
H2S04
MgSO4
Na2SO3
S03
Correct answer is D
No explanation has been provided for this answer.
If the volume of a gas at 35°C is 60cm3, what would be its volume in cm3 at 273k?
39.03
46.81
53.18
67.69
76.92
Correct answer is C
No explanation has been provided for this answer.
C\(_6\)H\(_{12}\)O\(_6\) What is the molar mass of the compound above? [ H=1, C=12, O=16 }
45
61
180
123
244
Correct answer is C
The compound above is identified as glucose
Carbon - 12 \(\times\) 6 atoms present
Hydrogen - 1 \(\times\) 12 atoms present
Oxygen - 16 \(\times\) 6 atoms present
= 72 + 12 + 96
= 180
hydrogen, oxygen
Hydrogen, tetraoxosulphate (VI) ion
oxygen, hydrogen
sulphur, hydrogen
sulphur, oxygen
Correct answer is C
No explanation has been provided for this answer.
A neon atom is chemically nonreactive because
the electrons at the outermost shell is partially filled
the number of protons equals the number of electrons
the outer electron shell is completely filled
there are equal number of protons and neutrons in its nucleus
there are no elections at the outermost shell
Correct answer is C
No explanation has been provided for this answer.