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