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.
C8H22O3
C6H10O3
C12H12O
C6H12O
C3H6O
Correct answer is D
carbon = 72%, hydrogen = 12%, 16%
Dividing by the atomic weight we have for C = \(\frac{5}{1}\) = 6
H = \(\frac{12}{1}\) = 12
O = \(\frac{16}{16}\) = 1
Divide by the smallest number, we have = \(\frac{6}{1}\) = 6
H = \(\frac{12}{1}\) = 12
O = \(\frac{1}{1}\) = 1
The formula is C6H12O
Which of the following conduct electricity?
sulfur
graphite
diamond
red phosphorus
yellow phosphorus
Correct answer is B
No explanation has been provided for this answer.
10.0 moles dm-3
7.0 moles dm-3
3.5 moles dm-3
2.0 moles dm-3
Correct answer is D
No explanation has been provided for this answer.
i and ii
i, ii and iii
iii and iv
i, iii and iv
Correct answer is D
Atomic radius is the distance from the atom's nucleus to the outer edge of the electron cloud. In general, atomic radius decreases across a period and increases down a group.
An element with atomic number twelve is likely to be
electrovalent with a velocity of 1
electrovalent with a valency of 2
covalent with a valency of 2
covalent with valency of 4
Correct answer is B
No explanation has been provided for this answer.