1. Which is the lightest metal ?

Answer: Lithium

2. Which is largest continent ?

Answer: Asia

3. Which is the longest day in the year ?

Answer: June 21

4. Which is the Densest populated State of India ?

Answer: West Bengal

5. What is the name of tallest Animal ?

Answer: Giraffe

6. 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.

7. Which is smallest and largest bird ?

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