Chemistry The most abundant element by number in the living system is : Nitrogen Carbon Hydrogen Oxygen Nitrogen Carbon Hydrogen Oxygen ANSWER DOWNLOAD EXAMIANS APP
Chemistry By-product obtained by soap industry is Naphthalene Caustic potash Glycerol Caustic soda Naphthalene Caustic potash Glycerol Caustic soda ANSWER DOWNLOAD EXAMIANS APP
Chemistry Why is water not suitable for putting out a petrol fire ? Water, being heavy, slips below petrol which thus remains in contact with air and burns The heat required for combustion of petrol is very low Petrol is too inflammable to be extinguished by water The oxygen content of water is isolated by petrol and thus it helps in burning Water, being heavy, slips below petrol which thus remains in contact with air and burns The heat required for combustion of petrol is very low Petrol is too inflammable to be extinguished by water The oxygen content of water is isolated by petrol and thus it helps in burning ANSWER DOWNLOAD EXAMIANS APP
Chemistry Iodine value is used to estimate Carboxylic groups in oil Hydroxyl groups in oil Unsaturation in oil Alkali content in oil Carboxylic groups in oil Hydroxyl groups in oil Unsaturation in oil Alkali content in oil ANSWER DOWNLOAD EXAMIANS APP
Chemistry The element used in the manufacture of safety matches is Sulphur Phosphorous Silicon Magnesium Sulphur Phosphorous Silicon Magnesium ANSWER DOWNLOAD EXAMIANS APP
Chemistry The first metal used by man was gold copper bronze iron gold copper bronze iron ANSWER DOWNLOAD EXAMIANS APP
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