Metals and their compoundsExtraction of metals: it is the process by which metals are isolated from their …
Chemistry: Periodic Table
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Periodic tableHistorical development of periodic tableClassification of the elements began with Lavoisier, whose classification was based on …
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Physics: Optical Instruments And Applications
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Optical instruments: ApplicationsMicroscopes: one of the applications of light waves is seen in the operation of a …
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Chemistry: Electrolysis
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Electrochemical cellsThe set up in which chemical energy is converted to electrical energy is called an Electrochemical …
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Physics: Propagation Of Sound Waves
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Propagation of sound waves(A) Source of sound waveSound is a form of wave motion which is conveyed …