The iron (III) oxide impurity in bauxite can be removed by?
Fractional crystallization in acid solution
dissolution in sodium hydroxide and filtration
extraction with concentrated ammonia and reprecipitation
electroysis of molten mixture
Correct answer is B
No explanation has been provided for this answer.
4: 1: 2
3:8:2
2:8:3
8:3:2
Correct answer is B
No explanation has been provided for this answer.
Ammonia gas is normally dried with?
concentrated sulphuric acid
quicklime
anhydrous calcium chloride
magnesium sulphate
Correct answer is B
No explanation has been provided for this answer.
NaHS
Na2SO3
Na2S
NaHSO3
Correct answer is A
No explanation has been provided for this answer.
When chlorine is passed into water and subsequently exposed to sunlight, the gas evolved is?
HCl
HOCl
O2
Cl2O
Correct answer is C
No explanation has been provided for this answer.