Chemistry Diamond is harder than graphite because of : Difference in layers of atoms Tetrahedral structure of diamond None of these Difference of crystalline structures Difference in layers of atoms Tetrahedral structure of diamond None of these Difference of crystalline structures ANSWER DOWNLOAD EXAMIANS APP
Chemistry The gas used to extinguish fire is Carbon dioxide Neon Carbon monoxide Nitrogen Carbon dioxide Neon Carbon monoxide Nitrogen ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which among the following coal contains 90 per cent of carbon? Lignite Bitumen Anthracite Peat Lignite Bitumen Anthracite Peat ANSWER DOWNLOAD EXAMIANS APP
Chemistry One carat of diamond is equal to 250 mg 200 mg 150 mg 100 mg 250 mg 200 mg 150 mg 100 mg ANSWER DOWNLOAD EXAMIANS APP
Chemistry Hardest allotrope of carbon is Lamp black Graphite Diamond Coke Lamp black Graphite Diamond Coke ANSWER DOWNLOAD EXAMIANS APP
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