Chemistry Copper substances when exposed to air gains a green coating due to the formation of: CuO CuSO4 CuCO3 Cu(OH)2 Cu(NO3)2 CuO CuSO4 CuCO3 Cu(OH)2 Cu(NO3)2 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Sodium Carbonate is commonly known as Caustic Potash Caustic Soda Washing Soda Baking Soda Caustic Potash Caustic Soda Washing Soda Baking Soda ANSWER DOWNLOAD EXAMIANS APP
Chemistry The major constituent of air is hydrogen oxygen carbon dioxide nitrogen hydrogen oxygen carbon dioxide nitrogen ANSWER DOWNLOAD EXAMIANS APP
Chemistry Activated Charcoal is used to remove colouring matter from pure substances by Reduction Oxidation Bleaching Adsorption Reduction Oxidation Bleaching Adsorption ANSWER DOWNLOAD EXAMIANS APP
Chemistry Heating of a ore below its melting point in the absence of air is known as Refining Smelting Calcination Roasting Refining Smelting Calcination Roasting ANSWER DOWNLOAD EXAMIANS APP
Chemistry Wax used for making candle is chemically a mixture of Aliphatic hydrocarbons Cyclic hydrocarbons Aromatic hydrocarbons Aliphatic and aromatic hydrocarbons Aliphatic hydrocarbons Cyclic hydrocarbons Aromatic hydrocarbons Aliphatic and aromatic hydrocarbons ANSWER DOWNLOAD EXAMIANS APP
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