1. Who invented by Electric Lamp ?

Answer: Thomas Alva Edison of U.S.A. in 1879

2. Who invented Vitamin A ?

Answer: Mc Collum and M.Davis of U.S.A. in 1913

3. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

4. Who invented Super Computer ?

Answer:

Seymour Cray

5. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932

6. Who invented Periodic table ?

Answer:

Dmitri Mendeleev invented Periodic Table

7. Who invented Blood Transfusion ?

Answer: Jean-Baptiste Denys of France in 1625.