Chemistry What is the element that is in the highest percentage in the composition of the earth ? Silicon Iron Oxygen Magnesium Silicon Iron Oxygen Magnesium ANSWER DOWNLOAD EXAMIANS APP
Chemistry Combustion of a candle is a/an Endothermic reaction Physical change Exothermic reaction Photochemical reaction Endothermic reaction Physical change Exothermic reaction Photochemical reaction ANSWER DOWNLOAD EXAMIANS APP
Chemistry Detergents used for cleaning clothes and utensils contain Nitrates Bicarbonates Bismuthates Sulphonates Nitrates Bicarbonates Bismuthates Sulphonates ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following statement is correct ?Ozone is found in the earth's atmosphere mostly between 50 and 100 km 10 and 20 km 5 and 10 km 20 and 50 km 50 and 100 km 10 and 20 km 5 and 10 km 20 and 50 km ANSWER DOWNLOAD EXAMIANS APP
Chemistry Sulphur dioxide level in the atmosphere can be reduced by using More efficient car engines Static electricity to attract it in factory chimneys Low - sulphur fuels Catalytic converters in industry More efficient car engines Static electricity to attract it in factory chimneys Low - sulphur fuels Catalytic converters in industry ANSWER DOWNLOAD EXAMIANS APP
Chemistry Ethanol containing 5% water is known as Denatured spirit Rectified spirit Power alcohol Methylated alcohol Denatured spirit Rectified spirit Power alcohol Methylated alcohol ANSWER DOWNLOAD EXAMIANS APP
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