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