1. Which is the shortest day in the year ?

Answer: December 22

2. Longest rail tunnel in the world ?

Answer: Seikan Tunnel (Japan - 53.9 Km)

3. What is the name of brightest star ?

Answer: Sirius

4. Where is largest Archipelago ?

Answer: Indonesia

5. 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.

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

Answer: Sikkim

7. Which is the largest epic in world ?

Answer: Mahabharat