Which one of the following statements about allotropes of carbon is incorrect?

  • A
    Graphite is an electrical conductor but the conductivity is direction dependent.
  • B
    Diamond is more dense than graphite.
  • C
    Diamond is metastable.
  • D
    Graphite is thermodynamically less stable allotrope of carbon.

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Similar Questions

Silicon is an important constituent of which of the following?

Which of the following is $NOT$ a polymorphic form of silica $(SiO_2)$?

Which of the following is an amphoteric oxide?

Hydrolysis of which of the following carbides does not take place?

Match the following:
List-$I$ (Compound) List-$II$ (Silicate)
$A$. Zircon $(ZrSiO_4)$ $P$. Ring/Cyclic
$B$. Talc $(Mg_3(OH)_2(Si_2O_5)_2)$ $Q$. Ortho
$C$. Thortveitite $(Sc_2Si_2O_7)$ $R$. Pyro
$D$. Benitoite $(BaTiSi_3O_9)$ $S$. Sheet

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