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.
In the preparation of ammonia, which of the following is used as the drying agent?
CaO
CaCI2
Conc. H2SO4
P2O5
H3PO4
Correct answer is A
No explanation has been provided for this answer.
Which of the following processes takes place during electrolysis?
Positive ions are discharged at the anode bby gaining sufficient electrons to become neutral
Negative ions are dicharged at the anode by gaining suficient electrons to become neutral
Positive ions are discharged at the anode by losing sufficient electrons to become neutral
Negative ions are discharge at the anode by losing sufficient electrons to become neutral
Nothing happens
Correct answer is D
During electrolysis, Negative ions are discharged at the anode by losing sufficient electrons to become neutral, and positive ions are discharged at the cathode by gaining sufficient electrons to become neutral.
The brown coloration in nitric acid prepared in the laboratory can be removed by?
heating the acid
bubbling air through the acid
cooling the acid
adding a decolorizing agent
adding a base
Correct answer is B
The color of nitrogen dioxide is reddish brown. This nitrogen dioxide when comes in contact with acid appears yellow in color.
This means the color of nitric acid can be removed by bubbling air through acid.
In the reaction
C + 2HNO3 → CO2 + NO2 + NO + H2O nitric acid is acting as?
a reducing agent
a nitrating agent
an oxidizing agent
a catalytic agent
a neutralizing agent
Correct answer is C
No explanation has been provided for this answer.
a drying agent
an oxidizing agent
a dehydrated agent
a reducing agent
a hydrolysing agent
Correct answer is C
No explanation has been provided for this answer.