In which district in the state of Rajasthan is saline soil found?

Where has the world's largest solar farm been set up recently? 

Who gave the current nomenclature for the state of Rajasthan?

Which sanctuary of the state has been declared as World Heritage?

Indus - acts as a water separator between the Sutlej group and the Ganges river groups

Which of the following pairs is incompatible?
Town                                      River
(a) Manrol                           Banganga
(b) Sangod                          Som
(c) Pachpahar                     Pipalyaz
(d) Keshoraipatan               Chambal

In which district is the zigzag dam located?

Which state is North to Rajasthan?