Which was the Arabic-Malayalam monthly started by Vakkom Abdul Kadir Moulavi ?

Which river of Kerala is mentioned as `Choorni' in Arthasasthra of Koutilya? 

Which is the pass that connects Kerala with Mysroe ? 

World Ozone Day is observed on:

Sardar Sarovar Dam is built on the river : 

Satya Sodhak Samaj was founded by