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.
0.01 mol dm\(^{-3}\)
0.101 mol dm\(^{-3}\)
1.01 mol dm \(^{-3}\)
10.0 mol dm\(^{-3}\)
Correct answer is C
solubility( in mol/dm^3) = \(\frac{ mass of salt}{ Molar Mass of salt} = \frac{ 1000cm^3}{ volume of solution in cm^3}\)
\(\frac{14}{138 } = \frac{ 1000cm^3}{ 100}\)
\(\frac{14000}{13800} = 1.01 mol/dm^3\)
The Bohr model of the atom proposed the existence of?
the nucleus
electron shells
nucleons
neutrons
Correct answer is B
Bohr Model is a planetary model in which the negatively charged electrons orbit a small, positively charged nucleus similar to the planets .
96500 C
9650 C
965 C
9.65 C
Correct answer is C
No explanation has been provided for this answer.
The reactivity of fluorine is high because of
its high electronegativity
the small size of the fluorine atom
the availability of d-orbitals
the strong F-F bond
Correct answer is A
No explanation has been provided for this answer.
Which of the following statements about Group VII elements is correct?
they are present in the same physical state
they are strong reducing agents
their reactivity decreases down the group
they exist as monoatomic molecules
Correct answer is C
No explanation has been provided for this answer.