1. Which is the longest River in the World ?

Answer: Nile

2. Which is highest dam in world ?

Answer:

Jinping-I Dam - 305 m (1,001 ft) in China on Yalong river.
Second Highest is Nurek Dam 300 m (980 ft) Tajikistan on Vakhsh river.

3. Which is the largest desert in India ?

Answer: Thar (Rajasthan)

4. Which state is largest by Population ?

Answer: Uttar Pradesh

5. Which is the highest Plateau ?

Answer: Pamir, Tibet

6. Which is the biggest country in Area ?

Answer: Russia

7. Which is the longest day in the year ?

Answer: June 21