The correct option is A
Now, we can say that The normal oxide formed by the elementon extreme left is the most basic (e.g., Na2O
), whereas that formed by the element on extreme right is the most acidic (e.g., Cl2O7
). Oxides of elements in the centre are amphoteric (e.g., Al2O3, As2O3
) or neutral (eg., CO, No, N2O
). Amphoteric oxides behave as acid with bases and as base with acids, whereas neutral oxides have no acidic or basic properties.
With increase in oxidation number acidic character increases and basic character decreases. The oxides formed by element on extreme left is most basic (eg: Na2O
) where as on extreme right is the most acidic (eg. Cl2O7
), oxides of elements in the centre are amphoteric (e.g., Al2O3, As2O3
) or neutral (eg. Co, No, N2O
Therefore, we can say that
Ca, Na and Mg has more basic character rather than acidic character.
Elements from group 1 and 2 does not show acidic character
While oxides of Aluminium will be amphoteric in nature, i.e., they will show both acidic as well as basix character.
is strongest acid among these.