Chemistry Brass gets discoloured in air due to constant exposure in presence of: Hydrogenated wafers Aluminium sulphide Hydrogen sulphide Aluminium phosphide Hydrogenated wafers Aluminium sulphide Hydrogen sulphide Aluminium phosphide ANSWER DOWNLOAD EXAMIANS APP
Chemistry Acid rain is caused by the pollution of environment by Nitrous oxide and Sulphur dioxide Carbon dioxide and Nitrogen Carbon monoxide and Carbon dioxide Ozone and Carbon dioxide Nitrous oxide and Sulphur dioxide Carbon dioxide and Nitrogen Carbon monoxide and Carbon dioxide Ozone and Carbon dioxide ANSWER DOWNLOAD EXAMIANS APP
Chemistry If lime water is kept in the air, it turns milky due to presence of : Nitrogen Sulphurdioxide Oxygen Carbondioxide Nitrogen Sulphurdioxide Oxygen Carbondioxide ANSWER DOWNLOAD EXAMIANS APP
Chemistry The coating of a thin layer of zinc on steel or iron objects is known as Electroplating Tinning Galvanising Hot dipping Electroplating Tinning Galvanising Hot dipping ANSWER DOWNLOAD EXAMIANS APP
Chemistry Soap helps in better cleaning of clothes because It gives strength to solution Soap acts like catalyst It absorbs the dirt It reduces the surface tension of solution It gives strength to solution Soap acts like catalyst It absorbs the dirt It reduces the surface tension of solution ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is caused by the higher concentration of Nitrogen and Phosphorous ? Eutrophication Acidity Alkalinity Hardness Eutrophication Acidity Alkalinity Hardness ANSWER DOWNLOAD EXAMIANS APP
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