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1744 में Lavoisier ने experiments के basis में यह proof किया कि किसी reaction में mass conserve होता है। chemical reactions के दौरान mass न... -
change to hindi-Eng Homologous series It is noticed that the properties of CH3OH, C2H5OH, C3H7OH are very similar, properties are similar...
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Change to Hindi-English language In 1869, A Russian scientist D.I Mendeleev has done a well classification of elements. He no...
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