1. Which is the highest waterfall in the world ?

Answer: Angel, Venezuela

2. Which is longest river of India

Answer: Ganges

3. Longest rail tunnel in the world ?

Answer: Seikan Tunnel (Japan - 53.9 Km)

4. Which is Highest Award in India ?

Answer: Bharat Ratna

5. Which is smallest state by area of India ?

Answer: Goa

6. Which is the largest Zoo in the World ?

Answer: Berlin Zoological Garden (Germany)

7. 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.