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Question

Which of the following statements are true regarding diamond?
  1. Diamond is the hardest substance
  2. It is three dimensional natured
  3. It is a good conductor of electricity
  4. Used as gems in jewellery and abrasives

A
It is three dimensional natured
B
Used as gems in jewellery and abrasives
C
Diamond is the hardest substance
D
It is a good conductor of electricity
Solution
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The correct options are
A Diamond is the hardest substance
B It is three dimensional natured
D Used as gems in jewellery and abrasives
Diamond is the hardest naturally occurring substance because it is sp3 hybridized with strong covalent bonds. The strong covalent bonds cause the three-dimensional cage-like structure of diamond.
Diamond is a bad conductor of electricity because of lack of unpaired e in the outmost shell.
It is used in jewelry due to its high refractive nature.
Due to its hardness, it is used as an abrasive.

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