1. Which is Largest Dome in World ?

Answer: St. Peter's Basilica (Rome)

2. Which is the lightest gas ?

Answer: Hydrogen

3. Which is the biggest country in Area ?

Answer: Russia

4. Which is the highest dam in India ?

Answer: Tehri Dam on Bhagirathi River in Uttarakhand (Height of 260 metres)

5. Which is Place of heaviest rainfall ?

Answer: Mausinram (Meghalaya)

6. Which is the longest River in the World ?

Answer: Nile

7. Which is the longest Platform ?

Answer:

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