Chemistry The two metal ions that cause hardness to water are: Sodium, Calcium Calcium, Magnesium Sodium, Potassium Sodium, Magnesium Sodium, Calcium Calcium, Magnesium Sodium, Potassium Sodium, Magnesium ANSWER DOWNLOAD EXAMIANS APP
Chemistry Atomic number of an atom gives the number of which of the following ? Electrons Neutrons Protons Neutrons and protons Electrons Neutrons Protons Neutrons and protons ANSWER DOWNLOAD EXAMIANS APP
Chemistry The Latin word formica means ant. The name formic acid is derived from this Latin word because ants are attracted by the odour of this acid this acid was first obtained by the distillation of ants this acid, in ancient times, was used to eliminate ant-hills this corrosive acid is secreted by ants to drive away their enemies ants are attracted by the odour of this acid this acid was first obtained by the distillation of ants this acid, in ancient times, was used to eliminate ant-hills this corrosive acid is secreted by ants to drive away their enemies ANSWER DOWNLOAD EXAMIANS APP
Chemistry The main constituent of biogas is Methane Acetic acid Oxygen Methyl alcohol Methane Acetic acid Oxygen Methyl alcohol ANSWER DOWNLOAD EXAMIANS APP
Chemistry Highest percentage of carbon is found in which form of coal? Bituminous Lignite Peat Anthracite Bituminous Lignite Peat Anthracite ANSWER DOWNLOAD EXAMIANS APP
Chemistry The gas used for artificial ripening of green fruit is ethylene carbon dioxide ethane acetylene ethylene carbon dioxide ethane acetylene ANSWER DOWNLOAD EXAMIANS APP
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