An amphoteric oxide is a type of oxide that can act as both an acid and a base. This means it can react with both acids and bases, either accepting or donating protons (H⁺ ions) depending on the pH of the solution. Amphoteric oxides exhibit this dual behavior because they have both acidic and basic properties. Aluminum oxide (Al₂O₃) and zinc oxide (ZnO) are examples of common amphoteric oxides.

1. On November 26, 1949, the Constituent Assembly adopted the Indian Constitution. However, it was implemented throughout the country from January 26, 1950.

2. Since 2015, the Government of India has declared 26 November as Constitution Day. The objective of this decision is to promote the importance of the Constitution and educate citizens about their rights and duties.