Chlorine is produced commmercially by?
electrolysis of dilute hydrochloric acid
electrolysis of brine
neutralization of hydrogen chloride
heating potassium trioxochlorate (V)
Correct answer is B
No explanation has been provided for this answer.
The thermal decomposition of copper (ll)trioxonitrate (V) yields copper (ll) oxide, oxygen and?
nitrogen (ll) oxide
nitrogen (l) oxide
nitrogen (lV) oxide
nitrogen
Correct answer is C
No explanation has been provided for this answer.
Suitable reagents for the laboratory preparation nitrogen are?
sodium dioxonitrate (III) and ammonium chloride
sodium dioxonitrate (V) and ammonium chloride
sodium chloride and ammonium chloride
sodium chloride and ammonium diozonitrate (III)
Correct answer is A
No explanation has been provided for this answer.
H(s)S is reduced to S
Fe3+ ions are oxidized by H(s)S
Fe3+ ions are oxidized Fe3+ ions
Fe3+ ions are reduced to Fe2+ ions
Correct answer is D
No explanation has been provided for this answer.
Which of the following is used in fire extinguishers?
Carbon (ll) oxide
Carbon (lV) oxide
Sulphur (lV) oxide
Ammonia
Correct answer is B
No explanation has been provided for this answer.