1. The Khilji dynasty ruled Delhi from 1290 to 1320.

2. The founder of this dynasty was Jalaluddin Firoz Khilji, who gained power by killing Kaiqubad in 1290.

3. The most famous ruler of this dynasty was Alauddin Khilji, who ruled from 1296 to 1316.

4. Alauddin Khilji had conquered Chittor, a powerful state of Rajputana, in 1303 AD.

5. There were two great generals Ulugh Khan and Nusrat Khan in the Khilji dynasty.

6. Also worked on Alauddin Khilji's market system and land revenue administration.

1. The burning of coal is an example of a combination reaction (a combination).

2. When two or more elements combine to form a compound, it is called a combination reaction.

1. The Fundamental Duties of the citizens were added to the Constitution of India by the 42nd Constitutional Amendment Act, 1976.

2. By this amendment a new Part IV-A was added to the Constitution

3. In which 10 fundamental duties were included under Article 51A.

4. The idea of Fundamental Duties is inspired by the Constitution of Russia (erstwhile Soviet Union).

5. The 11th Fundamental Duties were added to the Constitution of India in the year 2002 through the '86th Constitutional Amendment'