Sodium hydroxide is prepared commercially from sodium chloride solution by?
electrolysis using mercury as cathode
hydrolysis in steam using a catalyst
electrolysis using iron as anode
treating sodium chloride with ammonia and carbon (IV) oxide
Correct answer is A
No explanation has been provided for this answer.
Which of the additives could improve the quality of steel?
Silicon
Sulphur and phosphorus
Carbon
Chromium and nickel
Correct answer is D
No explanation has been provided for this answer.
The removal of rust from iron by treatment with tetraoxosulphate (IV) acid is based on the?
hydrolysis of the iron
reaction of acid with base
oxidationof the rust
dehydration of the iron
Correct answer is D
No explanation has been provided for this answer.
a poisionous gas
an oxidizing agent
electronegative in nature
highly reactive
Correct answer is D
No explanation has been provided for this answer.
Coal gas is made up of carbon (II) oxide, hydrogen and?
nitrogen
air
argon
methane
Correct answer is D
No explanation has been provided for this answer.