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.
CuSO4 5H2O can be obtained from an aqueous solution of copper (ll) tetraoxosulphate (VI) by
evaporation to dryness
using chromatography
precipitation
crystallization
Correct answer is D
No explanation has been provided for this answer.
Average rate of evolution of gas
Total mass of gas evolved during the reaction
Time taken for the reaction to reach completion
lnitial reaction rates
Correct answer is B
No explanation has been provided for this answer.
the yield of XY 3 will decompose
more of XY3 will decompose
More of X2 will react
the forward reaction will go to completion
Correct answer is B
No explanation has been provided for this answer.
Which of the following salt solutions will have a pH greater than 7?
NaCl(aq)
Na2CO3(aq)
Na2SO4(aq)
NaHSO4(aq)
Correct answer is B
No explanation has been provided for this answer.
Calculate the mass of sodium hydroxide in 5.00 dm3 of a 0.125 mol dm-3 solution [NaOH = 40 g mol]
0.0156 g
0.625 g
1.00 g
25.0 g
Correct answer is D
1 mole of NaOH per dm3 has a mass of 40g mass of NaOH in 0.125 mole = 0.125 x 40 = 5g mass in 5.00 dm3 of the solution = 5 x 5 = 25.0g