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. Longest rail tunnel in the world ?

Answer: Seikan Tunnel (Japan - 53.9 Km)

3. Which is Highest Gallantry Award in India ?

Answer: Paramveer Chakra

4. Which is the biggest museum in the world ?

Answer: British Museum, London

5. Which is the smallest state of India by Population ?

Answer: Sikkim

6. Which is longest river of India

Answer: Ganges

7. Which is largest Delta of India ?

Answer: Sundarban (W. Bengal)