1. 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.

2. Which is the largest gulf ?

Answer: Gulf of Mexico

3. Which is the longest road in India ?

Answer: Grand Trunk Road (2500 Km)

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

Answer: Rajasthan

5. Which is longest river of India

Answer: Ganges

6. Which is largest continent ?

Answer: Asia

7. Which is the highest waterfall in the world ?

Answer: Angel, Venezuela