A white powder produced when magnesium is burnt.
Magnesium oxide
Magnesium sulphate
Magnesium hydroxide
Magnesium chloride
The catalyst used in contact process.
Nickel
Zinc
Platinum
Vanadium oxide
The sulphur trioxide dissolves in sulphuric acid and forms a liquid called:
Sulphurous acid
Sulphuric acid
Oleum
Salt