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General Knowledge on Inventions | GK Test on Inventions Page 25
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Inventions

General Knowledge on Inventions

(Click on suggested Options to select the answer | Color Red means : Wrong & Green Means: Correct)

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241. Which country has created world's Lightest synthetic material on April 2016?
242. Who discovered the conversion of electrical energy into mechanical energy in 1821 leading to the invention of Electric motor?
243. Who invented bifocal lens in 1780?
244. Aspirin was discovered by which chemist in Germany in 1899?
245. Who was the first to produce a coloured photograph?
246. Biro Brothers made a practical design of which pen to help in quality writing?
247. Who developed the new design of steam engine that worked on the force of atmospheric pressure?
248. Who is the inventor of electromagnet?
249. Who invented the television?
250. Which scientist invented air pump to create a partial vacuum in 1650?

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