Chemistry The lustre of the metals is because of Reflection of light due to the presence of free electrons High polish High density, due to closed packing of atoms Absorption of light due to the presence of cavities Reflection of light due to the presence of free electrons High polish High density, due to closed packing of atoms Absorption of light due to the presence of cavities ANSWER DOWNLOAD EXAMIANS APP
Chemistry Vulcanized rubber contains sulphur 7-9% 0.02 10-15% 3-5% 7-9% 0.02 10-15% 3-5% ANSWER DOWNLOAD EXAMIANS APP
Chemistry The product, 9-nitroanthracene is obtained from anthracene by the action of Nitric acid and acetic anhydride Nitric acid and ethyl alcohol Nitric acid in excess Nitric acid and acetic acid Nitric acid and acetic anhydride Nitric acid and ethyl alcohol Nitric acid in excess Nitric acid and acetic acid ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following is used to restore the colour of old oilpaintings ? Barium peroxide Sodium peroxide Hydrogen peroxide Ozone Barium peroxide Sodium peroxide Hydrogen peroxide Ozone ANSWER DOWNLOAD EXAMIANS APP
Chemistry The monomer of polythene is ethyl alcohol None of these vinyl chloride ethylene ethyl alcohol None of these vinyl chloride ethylene ANSWER DOWNLOAD EXAMIANS APP
Chemistry The gas used for filling weather balloons is Helium Air Hydrogen Nitrogen Helium Air Hydrogen Nitrogen ANSWER DOWNLOAD EXAMIANS APP
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