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.
The salt formed from strong acid and a strong base is?
complex
neutral
basic
acidic
Correct answer is B
Sodium chloride, which is obtained by neutralization of hydrochloric acid and sodium hydroxide, is a neutral salt.
Neutralization of any strong acid with a strong base always gives a neutral salt.
Tartaric acid is used industrially to
make baking powder
make fruit juices
remove rust
dry substance
Correct answer is A
No explanation has been provided for this answer.
6 mins
8 mins
24 mins
48 mins
Correct answer is B
Cu2+ + 2e → Cu(s)
2 * 96500C deposit 64g of Cu
∴ x quantity of electricity wil deposit 0.08
x = (2 * 96500 * 0.08)/64 =241.25 coulomb.
Q = It
241.25 = 0.5t
t = 241.25/60 = 8 mins
C2H4(g) + H2(g) → C2H6(g) ΔH = -137kJ mol-1
The reaction represented above is
exothermic
spontaneous
endothermic
in equilibrium
Correct answer is A
No explanation has been provided for this answer.
What happens when zinc rod is immersed in copper (II) tetraoxosulphate (VI) solution/
The blue colour of the solution disappears
Electrons flow from copper to zinc
The zinc rod remain undissolved
The copper generate more copper ions
Correct answer is A
No explanation has been provided for this answer.