Inventions - Single MCQs (Page 6)

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Q51. What Sir Isaac Newton invented?...Q52. Who invented Fountain Pen?...Q53. When was the toothbrush invented?...Q54. When was Milk Tray first introduced?...Q55. What treat was invented by 11-year-old Frank Epperson in 1905?...Q56. Who synthesized the first wholly artificial gene?...Q57. FROZEN FOOD - Who discovered the first practical method of freezing food?...Q58. When was the Raggedy Ann doll patented?...Q59. What Frank Whittle invented?...Q60. FROZEN FOOD - Who discovered the first practical method of freezing food?...