Multiple choice general knowledge science & technology

Diamond is chemically

  1. mixture of metal carbonates

  2. pure carbon

  3. a pure form of sand

  4. mixture of calcium and magnesium phosphates
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Diamond is pure crystalline carbon, where each carbon atom is bonded tetrahedrally to four others in a giant covalent structure. This arrangement gives diamond its exceptional hardness. Graphite is also pure carbon but with a different layered structure.

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