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 oxides has a giant covalent structure?
Al2O3
Na2O
P4O10
SiO2
Correct answer is D
- Silicon dioxide is an example of a substance with a giant covalent structure . It contains many silicon and oxygen atoms. All the atoms in its structure are linked to each other by strong covalent bonds. The atoms are joined to each other in a regular arrangement, forming a giant covalent structure.
The bond between NH3 and H+ in NH4+ is?
dative
covalent
hydrogen
electrovalent
Correct answer is A
No explanation has been provided for this answer.
What is the solubility of the salt at 30°C? [CuSO4 = 160]
0.031
0.125
0.640
1.560
Correct answer is B
No explanation has been provided for this answer.
CH4 g + 202 g → CO2 g + H2Og
3.75 dm3
7.59 dm3
15.0 dm3
30.0dm3
Correct answer is C
1 mole of methane reacts with 2 moles of oxygen
1 vol of methane reacts with 2 vol of oxygen
: 7.5 vol of methane will yield 15 vol of oxygen in dm3