Chemistry Copper substances when exposed to air gains a green coating due to the formation of: CuO CuCO3 Cu(OH)2 CuSO4 Cu(NO3)2 CuO CuCO3 Cu(OH)2 CuSO4 Cu(NO3)2 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Iron and manganese present as pollutants in water cannot be removed by________ Chlorination Oxidation followed by settling and filtration Lime soda process or manganese zeolite process Ion exchange process Chlorination Oxidation followed by settling and filtration Lime soda process or manganese zeolite process Ion exchange process ANSWER DOWNLOAD EXAMIANS APP
Chemistry Photo-oxidation process is initiated by Catalyst Light Heat Oxygen Catalyst Light Heat Oxygen ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is used to denature ethanol ? Methane Propyl alcohol Phenol Methyl alcohol Methane Propyl alcohol Phenol Methyl alcohol ANSWER DOWNLOAD EXAMIANS APP
Chemistry What is the chemical name for ‘Baking Soda’ ? Sodium bicarbonate Sodium nitrate Sodium carbonate Sodium nitrite Sodium bicarbonate Sodium nitrate Sodium carbonate Sodium nitrite ANSWER DOWNLOAD EXAMIANS APP
Chemistry Atoms of same element having different mass numbers are called________ Isotopes Isobars Isomers Isotones Isotopes Isobars Isomers Isotones ANSWER DOWNLOAD EXAMIANS APP
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