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Abrasive (Invention)

Invention of Abrasive Abrasives as a class are simply hard substances used to rub-nard material to form softer substances. I…

ABO Blood Groups (Discovery)

Discovery of  ABO Blood Groups The Austrian - born American Biologist Karl Landsteiner in 1901 was the first to classify hum…

Abacus (Invention)

Invention of Abacus A calculating device consisting of balls strung on wires or rods set in a frame. It is probably of Babyl…

Abaca (Discovery)

Discovery of Abaca It is a plant grown in Borneo, Philippines and Sumatra for its fibre. The plant grows about 6 metres high…

Spectrometer Experiment Viva Questions

Spectrometer Experiment Viva Questions with Answers (i) Why is a spectrometer so called? Ans: It is an instrument to study t…

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