Select the correct statement regarding oxides

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As the electronegativity of element increases, acidic character of oxide increases.

Nitrogen forms all the three types of oxides (neutral, basic, and acidic)

Both B₂O₃ and Al₂O₃ are acidic oxides

Down the group the acidic nature of oxide increases

answer is A.

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Detailed Solution

Acidic oxides are those that either make a solution acidic after the addition of water or accept hydroxide ions from a solution (behave as a Lewis acid). The acidic character of oxides increases when the electronegativity difference between an element and oxygen decreases. The basic character of oxides increases on moving down the group, while the acidic character of oxides increases on moving left to right in a period. As a result, the acidic character of the oxide increases as the electronegativity of an element increases.

Boron is a non-metal and its oxide, B₂O₃ is an acidic oxide because it forms boric acid when react with water. Al₂O₃ is am amphoteric oxide because it reacts with both acid and base to form salt along with water.

Nitrogen is a non-metal, therefore it form acidic oxide. It also forms neutral oxide such as N₂O and NO, but it cannot form basic oxide.

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