Give reasons of the following :
Magnesium oxide is used for the lining of steel making furnace.

Give reasons of the following:
Why is sodium chloride added during electrolysis of fused anhydrous magnesium chloride?

The IUPAC name of the compound
CH₂ = CH $$-$$ CH(CH₃)₂

An unknown compound of carbon, hydrogen and oxygen contains 69.77% carbon and 11.63% hydrogen and has a molecular weight of 86. It does not reduce Fehling solution, but forms a bisulphite addition compound and gives a positive iodoform test. What are the possible structures?