Inventions - Single MCQs (Page 4)

Sponsored
Q31. Homoeography was invented by ?...Q32. Helicopter was invented by ?...Q33. DDT was invented by ?...Q34. Pneumatic tyre was invented by ?...Q35. Elias Home invented ?...Q36. Stethoscope was invented by ?...Q37. Bushwell invented ?...Q38. Analytical Engine was invented by ?...Q39. Who discovered oxygen?...Q40. Inert gases were discovered by?...