Chemistry Brown stains in vessels and clothes indicate the presence of high quantities of ________ in water Calcium None of these Magnesium Manganese Calcium None of these Magnesium Manganese ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following alloy is used in making magnet ? Duralumin Stainless steel Alnico Magnalium Duralumin Stainless steel Alnico Magnalium ANSWER DOWNLOAD EXAMIANS APP
Chemistry Aqua regia is a 1 : 3 mixture, by volume, of Conc. nitric acid and conc. sulphuric acid Conc. sulphuric acid and conc. nitric acid Conc. nitric acid and conc. hydrochloric acid Conc. hydrochloric acid and conc. nitric acid Conc. nitric acid and conc. sulphuric acid Conc. sulphuric acid and conc. nitric acid Conc. nitric acid and conc. hydrochloric acid Conc. hydrochloric acid and conc. nitric acid ANSWER DOWNLOAD EXAMIANS APP
Chemistry High concentration hydrocarbon pollutants in atmospheric air causes Respiratory diseases (e.g.asthma) Cancer Silicosis Reduced crop yield Respiratory diseases (e.g.asthma) Cancer Silicosis Reduced crop yield ANSWER DOWNLOAD EXAMIANS APP
Chemistry Where does the oxygen that keeps us alive come from? Oxides of minerals Water Carbonates absorbed from soil Carbon dioxide Oxides of minerals Water Carbonates absorbed from soil Carbon dioxide ANSWER DOWNLOAD EXAMIANS APP
Chemistry The working of a dry cell is based on Spontaneous oxidation-reduction reaction Electrolysis Combination reaction Decomposition reaction Spontaneous oxidation-reduction reaction Electrolysis Combination reaction Decomposition reaction ANSWER DOWNLOAD EXAMIANS APP
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