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 factors does not affect the rate of reaction of CaCO3 with HCI?
temperature of the reaction
solubility of the CaCO3
concentration of the HCI
surface area of the CaCO3
Correct answer is B
No explanation has been provided for this answer.
The activation energy of a reaction can be altered by
adding a reducing agent
applying a high pressure
using a catalyst
changing the temperature
Correct answer is C
No explanation has been provided for this answer.
3Fe(s) + 4H2O(g) ⇌ Fe3O4(s) + 4H2(g)
2NO2(g) ⇌ N2O 4(g)
3H2(g) + N2(g) ⇌ 2NH3(g)
2SO2(g) + O2(g) ⇌ 2SO3(g)
Correct answer is A
No explanation has been provided for this answer.
The volume occupied by a given mass of gas depends on its
diffusion rate
temperature and pressure
degree of solubility
relative density
Correct answer is B
No explanation has been provided for this answer.
Which of the following molecules has a linear structure?
NH3
H2O
CO2
CH4
Correct answer is C
No explanation has been provided for this answer.