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 Hydrogen Oxygen Carbon dioxide All of them Hydrogen Oxygen Carbon dioxide ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which of the following is used as filler in tyre of rubber ? Graphite Coke Carbon black Coal Graphite Coke Carbon black 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 Interrupted release of moisture from the material Accumulation of smoke and dust over the sigrees Tendency of carbon dioxide to form a layer along with dust smoke Lack of oxygen in the surroundings of sigrees Interrupted release of moisture from the material Accumulation of smoke and dust over the sigrees Tendency of carbon dioxide to form a layer along with dust smoke ANSWER DOWNLOAD EXAMIANS APP
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