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.
What is the basicity of the acid in the followed reaction? NaCO + 2CHCOOH → 2CH COONa + H2O + CO2
1
2
3
4
8
Correct answer is A
No explanation has been provided for this answer.
A mixture of NaCI(s) and CaCO3(s) is best separated by
dissolution followed by filtration
sublimation followed by crystallization
dissolution followed by evaporation
dissolution followed by crystallization
sublimation followed by dissolution
Correct answer is A
No explanation has been provided for this answer.
0.224dm3
2.24dm3
4.40dm3
4.48dm3
22.4dm3
Correct answer is B
From the equation, C + O2 → CO2 : 22.dm3 of oxygen is required to form 44g of CO2 the volume of O2 required to produce 4.4gm is x, :. x = 44/44 X 22.4dm3
Boyle's law can be expressed mathematically as
V \(\alpha\) T (P constant)
P \(\alpha\) V (T constant)
P \(\alpha\) T
V \(\alpha\) 1 / p(T constant)
V1/T1 =
Correct answer is D
The absolute pressure exerted by a given mass of an ideal gas is inversely proportional to the volume it occupies if the temperature and amount of gas remain
Which of the following Group 1 elements has the highest ionization energy?
55Cs
37Rb
19K
11Na
3Li
Correct answer is E
No explanation has been provided for this answer.