Which of the following is the carbon allotrope having a tetrahedral structure?
Diamond
In diamond, each carbon atom is sp3 hybridised and forms four equivalent covalent bonds directed toward the corners of a regular tetrahedron, generating a rigid three-dimensional network.
This uniform tetrahedral geometry (bond angle 109.5 degrees) explains diamond's exceptional hardness and high melting point.
Graphite is layered with sp2 carbons in planar hexagons; graphene is a single such planar sheet; fullerenes are closed spheroidal cages of sp2 carbon.
Hence, the tetrahedrally structured carbon allotrope is diamond.
Impurities are converted to compounds by adding refining agents in which type of refining method?
What colour does phenolphthalein turn to in a basic solution?
Metals of medium reactivity are generally found in the form of which compounds?
Which of the following is the purest form of iron?
A student is comparing samples of sulphur, carbon (Diamond), and bromine. Which property is least likely to be observed in all three?
Which of the following correctly explains why an acid shows acidic behaviour only in aqueous solution?
The study of metals and their properties belongs to which branch of chemistry?
In which combined form is oxygen found in the air besides free O2?
Which statement best describes the electrical conductivity of non-metals in their pure form?
Which material would be the best choice for electrical transmission lines?
What is deposited on iron in the process of Galvanization?
Which element is used for making solar cells?
Which gas is flushed in a bag of chips to prevent the chips from getting oxidized?
Terylene is a type of:
Who was the first Indian lady scientist who worked with organic chemistry and medicinal plant?