1. The Constituent Assembly passed the Constitution of India on November 26, 1949, but it came into force on January 26, 1950. India came into existence as a Republic on January 26, 1950.

2. The Constituent Assembly was established on December 9, 1946, to frame the Constitution of India. There were a total of 389 members in the Constituent Assembly, out of which 299 members were from the Indian National Congress. The Constituent Assembly drafted the Constitution in 2 years, 11 months and 18 days.

3. The Constitution of India is a written constitution. It is the longest-written constitution in the world. It consists of 395 articles, 8 schedules and 12 schedules. The Constitution sets out the structure, powers and functions of the Government of India. It also ensures the rights and freedoms of the citizens.

In chemistry rusting is called as oxidation. Oxidation is a chemical process where metal gains oxygen and become oxide. In rusting the Iron ore make a chemical reaction with the oxygen in the presence of water and environmental or atmospheric moisture to produce an Iron oxide. Iron oxide is otherwise called as rust. The rusting of iron is a chemical change because it is two substances reacting together to make a new substance.    Rusting would only be a physical change if iron molecules remained pure iron throughout the process.