1. Who invented Steam Engine ?

Answer: Thomas Savery of Britain in 1698

2. Who invented Neon Lamp ?

Answer:

Georges Claude who was a French engineer, chemist and inventor

3. Who invented Periodic table ?

Answer:

Dmitri Mendeleev invented Periodic Table

4. Who invented Submarine ?

Answer:

John Philip Holland

5. Who invented Floppy disk ?

Answer: IBM in 1970

6. Who invented Optical Fibre ?

Answer:

Indian-born American physicist Narinder Kapany

7. Who invented X-ray ?

Answer: W.K. Roentgen of Germany in 1895.