Solution Diamond is hard because the carbon atoms in diamond are bonded in four covalent bonds in a stronger tetrahedron pattern, they form a giant crystalline structure, Hence diamond is hard,but graphite is soft and slippery because the hexagonal structure of carbon atoms in graphite are bonded in layers with only weak vanderwaal force holding …
“Why diamond is hard and graphite is soft ? ” give reason . Read More »
Graphite is a type of crystal carbon allotropes. It is a soft, black, flaky solid, a moderate electrical conductor. The carbon atoms are bonded in flat hexagonal lattices , which are then layered in sheets. In graphite, various hexagonal layers are held together by the weak van der Waal’s forces of attraction. The different graphite …
Graphite is soft and slippery, and its density is 2.3 g/cm3 . It is obvious that graphite is less dense than diamond, which makes it softer and more slippery. Graphite is soft and slippery because the hexagonal structure of carbon atoms in graphite are bonded in layers with only weak Vanderwaal force holding the layers together. …
Diamond: Each carbon atom in the crystalline lattice of a diamond is sp3 hybridised. The length of the C-C covalent bond between each carbon atom and the other four carbon atoms is 154 pm. A rigid 3-D network of carbon atoms with directional covalent bonds results from the structure’s extension into space. Diamond is the …
Why is diamond is the natural hardest substance on Earth? Read More »
Allotropes of carbon The element carbon occurs in different forms in nature with widely varying physical properties. Both diamond andgraphite are formed by carbon atoms, the difference lies in the manner in which the carbon atoms are bonded to oneanother. In diamond, each carbon atom is bonded to four other carbon atoms forming a rigid …
BONDING IN CARBON – THE COVALENT BOND Most carbon compounds are poor conductors of electricity .The boiling and melting points of the carbon compounds, we find that these compounds have low melting and boiling points as compared to ionic compounds . We can conclude that the forces of attraction between the molecules are not very …
SolutionAll minerals are ores, but not all minerals are ores because some of them may contain significant amounts of undesirable materials like sand, stones, and earthly impurities. For instance: Clay and bauxite, two minerals that contain aluminium, are found in the crust of the earth. Only bauxite can be used to efficiently and profitably extract …
“All ores are minerals but all minerals are not ores ” why ? Read More »
Gangue is generally an unwanted material or impurity that is present in an ore. or , Gangue- the impurities present in ore such as sand rock etc is known as gangue. Common silicate, oxide, carbonate, and sulphate minerals that lack sufficient concentrations of valuable metals make up gangue minerals.
Answer Ore “ Ore is a mineral from which metal can be extracted profitably and conveniently.On the basis of profitability, without economic loss, conveniency minerals are chosen as an ore. ”. Metals are isolated from their ores and this process is known as metallurgy. Example – Haematite is an ore of iron and its composition …
Anode mud The insoluble impurities settle down at the bottom of the anode in purification of metals are known as anode mud.
