Chemistry Ozone depletion in the atmosphere is mainly caused by Sulphur dioxide Nitrogen dioxide Chlorofluorocarbon Hydrogen sulphide Sulphur dioxide Nitrogen dioxide Chlorofluorocarbon Hydrogen sulphide ANSWER DOWNLOAD EXAMIANS APP
Chemistry Sour taste of lemon is due to the presence of which of the following ? Acetic acid Formic acid Oxalic acid Citric acid Acetic acid Formic acid Oxalic acid Citric acid ANSWER DOWNLOAD EXAMIANS APP
Chemistry The minimum energy required for an effective collision is Activation energy Threshold energy Free energy Internal energy Activation energy Threshold energy Free energy Internal energy ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following contributes largely to the ‘green house effect’ ? Carbon dioxide Water vapour Ozone Carbon monoxide Carbon dioxide Water vapour Ozone Carbon monoxide ANSWER DOWNLOAD EXAMIANS APP
Chemistry The two metal ions that cause hardness to water are: Calcium, Magnesium Sodium, Potassium Sodium, Magnesium Sodium, Calcium Calcium, Magnesium Sodium, Potassium Sodium, Magnesium Sodium, Calcium ANSWER DOWNLOAD EXAMIANS APP
Chemistry Main pollutants released from iron and steel industry are NO, SO3 and H2S CO, CO2 and SO2 CO2, NO2 and SO3 CO2, H2S and NO2 NO, SO3 and H2S CO, CO2 and SO2 CO2, NO2 and SO3 CO2, H2S and NO2 ANSWER DOWNLOAD EXAMIANS APP
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