Chemistry Which one of the following is used for dating very old objects of archaeological importance? Radium Carbon-14 Phosphorus-31 Tritium Radium Carbon-14 Phosphorus-31 Tritium ANSWER DOWNLOAD EXAMIANS APP
Chemistry In which of the following substances all carbon atoms are quaternary in nature ? Graphite Napthalene Diamond Teflon Graphite Napthalene Diamond Teflon ANSWER DOWNLOAD EXAMIANS APP
Chemistry When lime juice is dropped on baking soda, brisk effervescence takes place because the gas evolved is All of them Carbon dioxide Oxygen Hydrogen All of them Carbon dioxide Oxygen Hydrogen ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is used as filler in tyre of rubber ? Graphite Carbon black Coke Coal Graphite Carbon black Coke Coal ANSWER DOWNLOAD EXAMIANS APP
Chemistry The open "Sigrees" or coal stoves often require fanning to sustain burning because of Interrupted release of moisture from the material Tendency of carbon dioxide to form a layer along with dust smoke Lack of oxygen in the surroundings of sigrees Accumulation of smoke and dust over the sigrees Interrupted release of moisture from the material Tendency of carbon dioxide to form a layer along with dust smoke Lack of oxygen in the surroundings of sigrees Accumulation of smoke and dust over the sigrees ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS