Question:
Graphite is black in colour. This is because
Graphite is black in colour. This is because
Updated On: Jul 6, 2022
- graphite is obtained from coke which is black in colour
- it is an allotrope of carbon
- it is impure and amorphous form of carbon
- in graphite, the fourth non bonded singly occupied $p_z$ - orbital of each C-atom overlaps to give completely delocalized system of molecular orbitals. Due to the excitation of these electrons, graphite appears hlack
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The Correct Option is D
Solution and Explanation
In graphite, the fourth $p_z$ orbital of each C-atom overlaps to give completely delocalized system of molecular orbitals. Due to the excitation of these delocalized electrons, graphite appears black.
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Concepts Used:
P-Block Elements
- P block elements are those in which the last electron enters any of the three p-orbitals of their respective shells. Since a p-subshell has three degenerate p-orbitals each of which can accommodate two electrons, therefore in all there are six groups of p-block elements.
- P block elements are shiny and usually a good conductor of electricity and heat as they have a tendency to lose an electron. You will find some amazing properties of elements in a P-block element like gallium. It’s a metal that can melt in the palm of your hand. Silicon is also one of the most important metalloids of the p-block group as it is an important component of glass.
P block elements consist of:
- Group 13 Elements: Boron family
- Group 14 Elements: Carbon family
- Group 15 Elements: Nitrogen family
- Group 16 Elements: Oxygen family
- Group 17 Elements: Fluorine family
- Group 18 Elements: Neon family