Question

an element Xburns in air to form an oxide,this oxide reacts with sulphuric acid to form a salt.what does this element tell you about element X

Answer 1

From the given question we can tell that x is an metal . which is on combustion and reacts with sulphuric acid gives a salt now we can tell that these metal oxide is a base and when react with acid it gives a salt

if x is sodium or pottasium then the salt formed by the reaction is neutralised salt .

if x is another metal like iron or calcium or anything it gives a acidic salt because metal oxide formed by it is a weak base