1. Which is the lightest gas ?

Answer: Hydrogen

2. Which is the longest Platform ?

Answer:

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

3. Which is the Largest lake of the world ?

Answer: Caspian Sea (371,000 sq km)

4. Which is longest river in world ?

Answer: Nile, Africa

5. Which is Longest national highway of India ?

Answer: NH-7 ( Varanasi to Kanyakumari - 2,369 km)

6. Which is smallest and largest bird ?

Answer: Smallest Bird is Humming Bird and Largest bird is Ostrich

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

Answer: Sikkim