1. Who invented Periodic table ?

Answer:

Dmitri Mendeleev invented Periodic Table

2. Who invented Dynamo ?

Answer:

Hypolite Pixii of France in 1832

3. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

4. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

5. Who invented X-ray ?

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

6. Who invented Laptop ?

Answer:

Adam Osborne in 1981.

7. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902