an acidic oxide
a basic oxide
a neutral oxide
an amphoteric oxide
Correct answer is D
No explanation has been provided for this answer.
In the Haber process for the manufacture of ammonia, the catalyst commonly used is finely divided ?
vanadium
platinum
iron
copper
Correct answer is C
No explanation has been provided for this answer.
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.