1. Which is the largest Zoo in India ?

Answer: Zoological Gardens, Alipur, Kolkata

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 longest Platform ?

Answer:

Gorakhpur railway station, Uttar Pradesh, India (1355.40 meters)

4. Longest rail tunnel in the world ?

Answer: Seikan Tunnel (Japan - 53.9 Km)

5. Which is longest railway station ?

Answer: Grand Central Terminal, Chicago(USA).

6. Which is the longest Platform ?

Answer:

Gorakhpur railway station, Uttar Pradesh, India (1355.40 meters)

7. Which is the longest rail tunnel in India ?

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