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.
Pass each gas into water and test with blue litmus paper
Pass each gas into lime water
Expose each gas to atmospheric air
Pass each gas to concentrated tetraoxosulphate (IV) acid
Correct answer is B
No explanation has been provided for this answer.
The brown fumes given off when trioxonitrate (V) acid is heated consist of ?
NO2 and O2
H2O and NO2
NO2' O2 and H2O
NO, NO2 and H2O
Correct answer is A
decomposition of the acid by heat to produce reddish-brown gas (nitrogen (iv)) which then dissolve in the acid to impart the yellow colour.
Which of the following gases can be collected by the upward displacement of air?
NO
H 2
NH3
Cl 2
Correct answer is D
No explanation has been provided for this answer.
raising the pressure
raising the temperature
adding a catalyst
lowering the pressure
Correct answer is B
No explanation has been provided for this answer.
Which of the following samples will react fastest with dilute trioxonitrate (V) acid?
5 g of lumps of CacO3 at 25°C
5 g of powered CacO3 at 25°
5 g of lumps of CaCO3 at 50°C
5 g of powered CaCO3 AT 50°C
Correct answer is D
No explanation has been provided for this answer.