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 longest road in India ?

Answer: Grand Trunk Road (2500 Km)

3. Which is the biggest museum in the world ?

Answer: British Museum, London

4. Which is the longest rail tunnel in India ?

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

5. Which is the lightest metal ?

Answer: Lithium

6. Which is the brightest planet ?

Answer: Venus

7. Which is largest continent ?

Answer: Asia