1. Who invented Bacteria ?

Answer: Leeuwenhock of Netherlands in 1683

2. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

3. Who invented by Electric Lamp ?

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

4. Who invented Bleaching Powder ?

Answer: Tennant of Britain in 1798

5. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.

6. Who invented Automatic rifle ?

Answer: John Browning of U.S.A. in 1918.

7. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932