Which one of the following properties is NOT true for graphite ?

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Q: 36 (NDA-I/2018)

Which one of the following properties is NOT true for graphite ?

question_subject: 

Science

question_exam: 

NDA-I

stats: 

0,5,12,5,3,3,6

keywords: 

{'graphite': [0, 0, 3, 9], 'carbon atom': [0, 0, 0, 4], 'hybridisation': [3, 0, 0, 1], 'properties': [0, 0, 0, 1], 'electrons': [0, 0, 0, 5], 'hexagonal rings': [0, 0, 0, 2], 'atoms': [0, 0, 0, 2]}

In graphite, each carbon atom is hybridized in a trigonal planar arrangement with sp2 hybridization. This means that option 1, which states that the hybridization of each carbon atom is sp, is NOT true for graphite.

Option 2 correctly states that the hybridization of each carbon atom in graphite is sp2. This hybridization allows each carbon atom to form three sigma bonds, resulting in a hexagonal lattice structure.

Option 3 is true for graphite. The delocalization of electrons over the whole sheet of atoms gives graphite its characteristic electrical conductivity and lubricating properties.

Option 4 is also true for graphite. The layers in graphite are composed of hexagonal rings of carbon atoms that are arranged in a honeycomb lattice structure.

Therefore, the correct answer is option 1 - hybridization of each carbon atom is not sp in graphite.