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.
Which of the following statements is correct about sodium chloride in the solid state?
it exists as aggregates of ions
it conducts electricity
its melting point is below 100oC
it exists as discrete molecules
its ions are linked by metallic bonds
Correct answer is A
No explanation has been provided for this answer.
The valence electrons of element 12Mg are in the
1s orbital
2s orbital
2px orbital
2py orbital
3s orbital
Correct answer is E
No explanation has been provided for this answer.
metallic bonding
covalent bonding
electrovalent bonding
dative bonding
hydrogen bonding
Correct answer is C
No explanation has been provided for this answer.
If an element R belongs to the same group as sodium, an aqueous solution of ROH will
be neutral
be acidic
be coloured
have pH greater than 7
turn back litmus red
Correct answer is D
No explanation has been provided for this answer.
An atom 17 protons, 17 electrons and 18 neutrons has a mass number of
17
18
34
35
52
Correct answer is D
No explanation has been provided for this answer.