1. Which is largest continent ?

Answer: Asia

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 Zoo in the World ?

Answer: Berlin Zoological Garden (Germany)

4. Which is biggest planet ?

Answer: Jupiter

5. Which is longest tributary river of India ?

Answer: Yamuna

6. Which is the deepest lake of the world ?

Answer: Lake Baikal

7. Which is the longest rail tunnel in India ?

Answer: Pir Panjal (J&k, 11215 metre)