1. Which state is largest by Population ?

Answer: Uttar Pradesh

2. 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.

3. Which is the longest River in the World ?

Answer: Nile

4. Which is Highest Gallantry Award in India ?

Answer: Paramveer Chakra

5. Which is the longest rail tunnel in India ?

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

6. Which is the Densest populated State of India ?

Answer: West Bengal

7. Which is the longest Platform ?

Answer:

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