1. Who invented Ball-Point Pen ?

Answer: John J. Loud of U.S.A. in 1888

2. Who invented Periodic table ?

Answer:

Dmitri Mendeleev invented Periodic Table

3. Who invented Automatic rifle ?

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

4. Who invented Computer ?

Answer:

Charles Babbage

5. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

6. Who invented Bleaching Powder ?

Answer: Tennant of Britain in 1798

7. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932