1341. Radioactivity was discovered by :
A. Henry Bequerel *
B. Marie Curie
C. Newton
D. Einstein
1342. Who discovered neutrons ?
A. Chadwich *
B. Thomson
C. Rutherford
D. Goldstein
1343. Cell theory was propounded by :
A. R.Virchow
B. Robert Hooke
C. Schleiden and Schwan *
D. William Harvey
1344. Who is known as the father of zoology ?
A. Schaller
B. Perkins
C. Dawkins
D. Aristotle
1345. Electron was discovered by :
A. Ernest Rutherford
B. Max Planck
C. Joseph Thompson
D. Albert Einstein *
1346. Who invented the hydrogen bomb?
A. Oppenheimer
B. Albert Einstein
C. Samuel Cohen *
D. Edward Teller
1347. Who invented the internal combustion engine ?
A. Franco Modigliani
B. Rudolf diesel *
C. Carl Benz
D. Jacques
1348. Which device was invented in 1973 by Dr Martin cooper at motorola?
A. Cordless phone
B. Pager
C. Cell Phone *
D. Satellite phone
1349. Who invented the ball point pen ?
A. Write brothers
B. Bicc brothers
C. Biro brothers *
D. Waterman
1350. James watt is famous for invention of :
A. Steam Boat
B. Diving Bell
C. Steam Engine *
D. Hot air balloon