General knowledge Series-28

GK Quiz , for Competitive Exam like UPSC, SSC, FDA, and SDA etc… General Knowledge Series -27 Quiz

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General Knowledge Series 28

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Q.271 Electron was discovered by

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Q.272 The first thermionic valve was invented by

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Q,273 Gunpowder was invented by

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Q.274 For which invention is Otto Hahn famous?

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Q.275  Leprosy bacillus was invented by

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Q.276  X-rays were discovered by

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Q,277 Who discovered cement?

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Q.278 Who discovered North Pole ?

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Q.279 Bacteria was first discovered by

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Q.280  Electron microscope was discovered by

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