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.
Hardening of an oil may be achieved by?
boiling the oil with water
boiling the oil with a catalyst
treating the oil with sodium hydroxide
treating the oil with hydrogen and catalyst
distilling oil under reduced pressure
Correct answer is D
No explanation has been provided for this answer.
Electrons flow towards the zinc rod
The zinc rod dissolves
The temperature of the soil changes
The blue colour of the solution gradually disappears
Copper metal is deposited
Correct answer is A
No explanation has been provided for this answer.
The chemical reaction which takes place at the anode (positive electrode) in electrolysis is?
oxidation
hydrolysis
dissociation
reduction
disproportionation
Correct answer is A
No explanation has been provided for this answer.
Which of the following silver halides is readily soluble in ammonium hydroxide?
Agl
AgBr
AgCl
AgF
None of the above
Correct answer is C
No explanation has been provided for this answer.
In which of the following is the oxidation state of oxygen different from its value in water?
OH-
H3O+
O-
H2O2
SO2
Correct answer is D
No explanation has been provided for this answer.