Chemistry The BOD values of water indicate the Amount of oxygen used for biochemical oxidation Amount of ozone used for biochemical oxidation Amount of oxygen used for biochemical reduction Amount of organic debris Amount of oxygen used for biochemical oxidation Amount of ozone used for biochemical oxidation Amount of oxygen used for biochemical reduction Amount of organic debris ANSWER DOWNLOAD EXAMIANS APP
Chemistry The depletion of Ozone layer is mainly due to Radioactive rays Aviation fuels Chlorofluorocarbons Volcanic eruptions Radioactive rays Aviation fuels Chlorofluorocarbons Volcanic eruptions ANSWER DOWNLOAD EXAMIANS APP
Chemistry The mass number of a nucleus is the sum of the number of protons and neutrons present in the nucleus a fraction always more than the atomic weight always less than its atomic number the sum of the number of protons and neutrons present in the nucleus a fraction always more than the atomic weight always less than its atomic number ANSWER DOWNLOAD EXAMIANS APP
Chemistry The rusting of iron is a/an Electrical change None of these Physical change Electrochemical change Electrical change None of these Physical change Electrochemical change ANSWER DOWNLOAD EXAMIANS APP
Chemistry Nylon threads are made of Polyester polymer Polysaccharide Polyvinyl polymer Polyamide polymer Polyester polymer Polysaccharide Polyvinyl polymer Polyamide polymer ANSWER DOWNLOAD EXAMIANS APP
Chemistry Sour taste of lemon is due to the presence of which of the following ? Acetic acid Citric acid Formic acid Oxalic acid Acetic acid Citric acid Formic acid Oxalic acid ANSWER DOWNLOAD EXAMIANS APP
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