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.
A salt which loses its mass when exposed to air is
deliquescent
effervescent
Efflorescent
fluorescent
hygroscopic
Correct answer is C
No explanation has been provided for this answer.
across a period from left to right
across a period from right to left
diagonally down the group
down a group
with decrease in atomic number
Correct answer is A
No explanation has been provided for this answer.
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