Question

Metals form on reacting with oxygen- (a) acidic oxides (b) basic oxides (c) neutral oxides (d) non-reactive oxides

Answer 1

Explanation:metals on reacting with oxygen to form basic oxide.

example: Fe + O2 ------> Fe3O4

2Mg +O2 ------> 2MgO

but sometime they can also form neutral oxide

Answer 2

metals on reacting with oxygen forms basic oxides but cannot form neutral oxides . but , a non metal on reaction with oxygen can form neutral oxides or acidic oxides to test whether it is a acid or base it can't be just tested with litmus paper as it is dry we should dissolve it in water and then test with litmus paper

this is the correct answer

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