Chemistry Brown stains in vessels and clothes indicate the presence of high quantities of ________ in water Magnesium Calcium None of these Manganese Magnesium Calcium None of these Manganese ANSWER DOWNLOAD EXAMIANS APP
Chemistry The metal ion present in Vitamin B12 is Zinc Iron Cobalt Nickel Zinc Iron Cobalt Nickel ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is not soluble in water ? Zinc sulphate Sodium sulphate Lead Sulphate Potassium sulphate Zinc sulphate Sodium sulphate Lead Sulphate Potassium sulphate ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following metals pollutes the air of a city having large number of automobiles? Chromium Copper Cadmium Lead Chromium Copper Cadmium Lead ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the process is known as nitrification? Conversion of nitrite to nitric oxide Reaction of nitrogen dioxide with water to form nitric acid Conversion of ammonia to nitrites Reaction of Nitrogen Monoxide with oxygen to form nitric acid Conversion of nitrite to nitric oxide Reaction of nitrogen dioxide with water to form nitric acid Conversion of ammonia to nitrites Reaction of Nitrogen Monoxide with oxygen to form nitric acid ANSWER DOWNLOAD EXAMIANS APP
Chemistry The first metal used by man was iron gold bronze copper iron gold bronze copper ANSWER DOWNLOAD EXAMIANS APP
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