1. Which is Longest Dam in India ?

Answer: Hirakod Dam (Orissa)

2. Which is longest tributary river of India ?

Answer: Yamuna

3. Which is the largest sea in the world ?

Answer:

Philippine Sea

4. Which is the state largest by area in India ?

Answer: Rajasthan

5. Which is the Densest populated State of India ?

Answer: West Bengal

6. Which is the highest dam in India ?

Answer: Tehri Dam on Bhagirathi River in Uttarakhand (Height of 260 metres)

7. Which is smallest planet ?

Answer: Mercury