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.
A substance is said to be impure if
its melting point range is wide
it dissolves in water with difficult
it has a low melting point
it is coloured
Correct answer is A
No explanation has been provided for this answer.
Which of the following acids would readily react with CaCO3 to liberate CO2?
CH3COOH
H2SO4
H2SO3
HNO3
Correct answer is B
H2SO4(aq)+CaCO3(aq)→CaSO4(aq)+CO2(g)+H2O(l)
The aqueous solution which has pH > 7 is
FeCI3(aq)
CuSO4(aq)
KNO3(aq)
Na2CO3(aq)
Correct answer is D
No explanation has been provided for this answer.