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 What is the element that is in the highest percentage in the composition of the earth ? Oxygen Magnesium Silicon Iron Oxygen Magnesium Silicon Iron ANSWER DOWNLOAD EXAMIANS APP
Chemistry The lustre of the metals is because of High polish Absorption of light due to the presence of cavities High density, due to closed packing of atoms Reflection of light due to the presence of free electrons High polish Absorption of light due to the presence of cavities High density, due to closed packing of atoms Reflection of light due to the presence of free electrons ANSWER DOWNLOAD EXAMIANS APP
Chemistry Periodic table contains how many groups 17 18 16 19 17 18 16 19 ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which gas emitted by power stations causes acid rain? Carbon dioxide Helium Sulphur dioxide Nitrogen Carbon dioxide Helium Sulphur dioxide Nitrogen ANSWER DOWNLOAD EXAMIANS APP
Chemistry Which one of the following has greatest mass ? Hydrogen nucleus Neutron Electron Proton Hydrogen nucleus Neutron Electron Proton ANSWER DOWNLOAD EXAMIANS APP
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