1. Which is the largest Zoo in the World ?

Answer: Berlin Zoological Garden (Germany)

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 largest Dome in India ?

Answer: Gol Gumbaz (Karnataka)

4. Which is the largest Zoo in India ?

Answer: Zoological Gardens, Alipur, Kolkata

5. Which is Largest Dome in World ?

Answer: St. Peter's Basilica (Rome)

6. Which is the largest gulf ?

Answer: Gulf of Mexico

7. Which is the longest River in the World ?

Answer: Nile