Chemistry The metallic constituents of hard water are : Magnesium, calcium and tin Calcium, magnesium and iron Magnesium, tin and iron Iron, tin and calcium Magnesium, calcium and tin Calcium, magnesium and iron Magnesium, tin and iron Iron, tin and calcium ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which variety of coal contains recognisable traces of the original plant material ? Bitumen Peat Anthracite Lignite Bitumen Peat Anthracite Lignite ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is not soluble in water ? Potassium sulphate Zinc sulphate Sodium sulphate Lead Sulphate Potassium sulphate Zinc sulphate Sodium sulphate Lead Sulphate ANSWER DOWNLOAD EXAMIANS APP
Chemistry Stains of rust on clothes can be removed by : Alcohol Oxalic acid H2O2 Petrol Alcohol Oxalic acid H2O2 Petrol ANSWER DOWNLOAD EXAMIANS APP
Chemistry Silicon is used in Transistors All of these Solar energy devices Semiconductors Transistors All of these Solar energy devices Semiconductors ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of these acids is not organic in origin? Sulphuric acid Oxalic acid Lactic acid Citric acid Sulphuric acid Oxalic acid Lactic acid Citric acid ANSWER DOWNLOAD EXAMIANS APP
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