Chemistry Which one of the following is commonly used for pulp bleaching in the paper industry? Iodine and water Hydrogen peroxide Mild sulphuric acid Glucose isomerase Iodine and water Hydrogen peroxide Mild sulphuric acid Glucose isomerase ANSWER DOWNLOAD EXAMIANS APP
Chemistry The atomic number of carbon is 6 and its atomic mass is 12. How many are there protons in the nucleus of carbon ? 12 18 6 Zero 12 18 6 Zero ANSWER DOWNLOAD EXAMIANS APP
Chemistry The minimum energy required for an effective collision is Internal energy Threshold energy Activation energy Free energy Internal energy Threshold energy Activation energy Free energy ANSWER DOWNLOAD EXAMIANS APP
Chemistry The tip of the match-stick contains Phosphorus pentoxide White phosphorus Red phosphorus Phosphorus trichloride Phosphorus pentoxide White phosphorus Red phosphorus Phosphorus trichloride ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is not a precious/semi-precious stone? Pearl Sapphire Emerald Ruby Pearl Sapphire Emerald Ruby ANSWER DOWNLOAD EXAMIANS APP
Chemistry The lustre of the metals is because of High density, due to closed packing of atoms Reflection of light due to the presence of free electrons Absorption of light due to the presence of cavities High polish High density, due to closed packing of atoms Reflection of light due to the presence of free electrons Absorption of light due to the presence of cavities High polish ANSWER DOWNLOAD EXAMIANS APP
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