Chemistry What is the element that is in the highest percentage in the composition of the earth ? Oxygen Iron Magnesium Silicon Oxygen Iron Magnesium Silicon ANSWER DOWNLOAD EXAMIANS APP
Chemistry The compound that has the least value for octane number is : 2,2-dimethyl hexane N-heptane 2-methyl heptane Iso-octane 2,2-dimethyl hexane N-heptane 2-methyl heptane Iso-octane ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is not a gaseous air pollutant? Oxides of sulphur Hydrocarbon Oxides of nitrogen Smoke Oxides of sulphur Hydrocarbon Oxides of nitrogen Smoke ANSWER DOWNLOAD EXAMIANS APP
Chemistry Nitric acid does not react with Zinc Copper Iron Gold Zinc Copper Iron Gold ANSWER DOWNLOAD EXAMIANS APP
Chemistry Petroleum is a mixture of Elements Salts Polymers Hydrocarbons Elements Salts Polymers Hydrocarbons ANSWER DOWNLOAD EXAMIANS APP
Chemistry Poison used for killing rats is Zinc phosphide (Zn3P2) Calcium phosphide (Ca3P2) Magnesium phosphide (Mg3P2) Magnesium nitride (Mg3N2) Zinc phosphide (Zn3P2) Calcium phosphide (Ca3P2) Magnesium phosphide (Mg3P2) Magnesium nitride (Mg3N2) ANSWER DOWNLOAD EXAMIANS APP
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