1. Where is largest Archipelago ?

Answer: Indonesia

2. Which is Largest railway route in India ?

Answer: Dibrugarh in Assam to Kannyakumari in Tamil Nadu.

3. Which is the longest Platform ?

Answer:

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

4. 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.

5. Which Indian state is having longest coastline ?

Answer: Gujrat

6. Which is longest river in world ?

Answer: Nile, Africa

7. Which is Largest Dome in World ?

Answer: St. Peter's Basilica (Rome)