For the following questions answer them individually
By which Indian Constitutional Amendment Act was the $$11^{th}$$ fundamental duty added in the Indian Constitution?
Which of the following Acts prevents disrespect to the National Flag and National Anthem?
In alchemy, aqua fortis is the classical name of which chemical compound that is used chiefly in the manufacture of explosives and fertilisers, and in organic synthesis?
Which of the following mosques/masjids was built during the reign of Lodi dynasty of the Delhi Sultanate?
Who was the first ecologist to describe the specific shape of eco-trophic interactions,Which he called the pyramid of numbers, in the 1920s?