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.
zinc
phosphorus
lead
sodium
Correct answer is D
No explanation has been provided for this answer.
l only
ll only
l and ll only
ll and lll only
Correct answer is C
Both i and ii will precipitate with H2SO4, SEE EQUATION BELOW
Pb(NO3)2+H2SO4→PbSO4+2HNO3.
H2SO4 +BaCl2 → BaSO4 + 2HCl
both PbSO4 and BaS04 are slightly solid so they precipitate out of solution as solid
Which of the following salts can be prepared by reacting the metal with dilute H2SO4?
CuSO4
MgSO4
BaSO4
PbSO4
Correct answer is B
No explanation has been provided for this answer.
CH3COOH
NaHCO3
C2H5OH
H2O2
Correct answer is B
Bees on the other hand have acidic toxins in their stings, and so an alkaline solution should be applied to neutralize them. Baking soda (\(NaHCO_{3}\)) mixed with cold water is usually the most effective way of making an alkaline solution.
Which of the following acids is dibasic?
Hydrochloric acid
Trioxosulphate (IV) acid
Dioxonitrate (lll) acid
Ethanoic acid
Correct answer is B
No explanation has been provided for this answer.