Answer : 1. "सूरतगढ़ थर्मल"
Explanation :

1. Suratgarh Thermal Power Plant is the first and largest thermal power plant in Rajasthan.

2. It is situated in Sriganganagar district.

3. It has an installed capacity of 1500 MW, which is the highest in the state.

4. The climate here is extremely hot and cold and the temperature ranges between -1 to 50 degrees Celsius.