Chemistry Which variety of coal contains recognisable traces of the original plant material ? Bitumen Anthracite Peat Lignite Bitumen Anthracite Peat Lignite ANSWER DOWNLOAD EXAMIANS APP
Chemistry Why is water not suitable for putting out a petrol fire ? Petrol is too inflammable to be extinguished by water The heat required for combustion of petrol is very low Water, being heavy, slips below petrol which thus remains in contact with air and burns The oxygen content of water is isolated by petrol and thus it helps in burning Petrol is too inflammable to be extinguished by water The heat required for combustion of petrol is very low Water, being heavy, slips below petrol which thus remains in contact with air and burns The oxygen content of water is isolated by petrol and thus it helps in burning ANSWER DOWNLOAD EXAMIANS APP
Chemistry Heating of a ore below its melting point in the absence of air is known as Smelting Calcination Roasting Refining Smelting Calcination Roasting Refining ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following elements is an example of noble gas ? Hydrogen Nitrogen Helium Chlorine Hydrogen Nitrogen Helium Chlorine ANSWER DOWNLOAD EXAMIANS APP
Chemistry A powerful eye irritant present in smog is Sulphur dioxide Nitric oxide Carbon dioxide Peroxyacetyl nitrate Sulphur dioxide Nitric oxide Carbon dioxide Peroxyacetyl nitrate ANSWER DOWNLOAD EXAMIANS APP
Chemistry When water itself combines chemically with some element or mineral it is called Oxidation Desilication Carbonation Hydration Oxidation Desilication Carbonation Hydration ANSWER DOWNLOAD EXAMIANS APP
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