Question 21
The scientist credited with the discovery of noble gases is?
Question 22
Electron was first identified by?
Question 23
Nobel Prize was started after the name of Alfred Nobel who invented?
Question 24
Who invented the telephone?
Question 25
The nucleic acid in cells was discovered by?
Question 26
Fax machine was invented by ?
Question 27
Penicillin was invented by Fleming in the year ?
Question 28
Toricelli invented ?
Question 29
Lift was invented by ?
Question 30
Telegrahic code was introduced by?