General Knowledge on Inventions

(Click on suggested Options to select the answer \| Color Red means : Wrong & Green Means: Correct)
301. Who invented Bakelite? A. Charles Goodyear B. Leo Hendrik Baekeland C. Roy Plunkett D. Henry Ford Check Answer \| Discussion 302. Who invented fuel cells in 1839? A. Buckminster Fuller B. Sir William Grove C. Sylvester Graham D. Joyce Hall Check Answer \| Discussion 303. Until Victorian times, chocolate was thought of as a drink. When did the first chocolate bar appear? A. 1828 B. 1831 C. 1825 D. There is no sure date Check Answer \| Discussion 304. What George Pullman invented? A. Sleeping (railway) car B. Airship C. Box car (railway) D. Air brakes Check Answer \| Discussion
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