1. Where is largest Archipelago ?

Answer: Indonesia

2. Which is longest tributary river of India ?

Answer: Yamuna

3. 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.

4. Which is the largest Mosque in World ?

Answer: Masjid al Haram (Saudi Arabia)

5. Which is the largest gulf ?

Answer: Gulf of Mexico

6. Which is the state largest by area in India ?

Answer: Rajasthan

7. Which is smallest state by area of India ?

Answer: Goa