There are 11 fundamental duties mentioned in the Indian Constitution. These duties were added by the 42nd Amendment Act in 1976. The fundamental duties are a set of moral obligations that every citizen of India is expected to follow. They are aimed at promoting unity, integrity, and harmony among the people of India.
The fundamental duties include respecting the national flag and the national anthem, safeguarding public property, promoting harmony and the spirit of common brotherhood, and protecting the environment.
These duties are not legally enforceable, but they serve as a guide for citizens to contribute towards the betterment of society. For more information, you can refer to the official website of the Government of India or the Indian Constitution.