1. Which is longest river in world ?

Answer: Nile, Africa

2. Which is smallest and largest bird ?

Answer: Smallest Bird is Humming Bird and Largest bird is Ostrich

3. Which is the Densest populated State of India ?

Answer: West Bengal

4. Which is the largest sea in the world ?

Answer:

Philippine Sea

5. Which is the longest wall in world ?

Answer: Great wall of China

6. Which state is largest by Population ?

Answer: Uttar Pradesh

7. Which is the biggest country in Area ?

Answer: Russia