Chemistry The mass number of a nucleus is the sum of the number of protons and neutrons present in the nucleus always more than the atomic weight always less than its atomic number a fraction the sum of the number of protons and neutrons present in the nucleus always more than the atomic weight always less than its atomic number a fraction ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which is the highest quality of hard coal? Bituminous Lignite Peat Anthracite Bituminous Lignite Peat Anthracite ANSWER DOWNLOAD EXAMIANS APP
Chemistry Ozone layer is present in Stratosphere Exosphere Ionosphere Troposphere Stratosphere Exosphere Ionosphere Troposphere ANSWER DOWNLOAD EXAMIANS APP
Chemistry Diamond is harder than graphite because of : Tetrahedral structure of diamond Difference of crystalline structures Difference in layers of atoms None of these Tetrahedral structure of diamond Difference of crystalline structures Difference in layers of atoms None of these ANSWER DOWNLOAD EXAMIANS APP
Chemistry The acid rain destroys vegetations because it contains Ozone Nitric acid Carbon monoxide Sulphuric acid Ozone Nitric acid Carbon monoxide Sulphuric acid ANSWER DOWNLOAD EXAMIANS APP
Chemistry The chemical name of ‘Common salt’ is Ammonium chloride Sodium nitrate Sodium chloride Calcium chloride Ammonium chloride Sodium nitrate Sodium chloride Calcium chloride ANSWER DOWNLOAD EXAMIANS APP
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