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Home/ Questions/Q 15952
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Asked: August 21, 20222022-08-21T10:24:50+00:00 2022-08-21T10:24:50+00:00In: Chemistry

Which one of the following is a covalent compound?

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  1. Calcium oxide
  2. Sodium nitride
  3. Silicon carbide
  4. Zinc sulphide
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    1. Best Answer
      Exampix Verified
      2022-08-21T10:25:15+00:00Added an answer on August 21, 2022 at 10:25 am
      Explanation:

      Covalent Bonds:

      • Covalent bonds are mostly found in organic compounds.
      • They are non-metallic weaker bonds.
      • Compounds having covalent bonds occur in liquid or gaseous states if in solid, they are soft solids.
      • They are bad conductors of heat and electricity.
      • Compounds having covalent bonds have low melting and boiling points.
      • Covalent compounds are insoluble in water and organic solvents.
      • Covalent bonds are of two types – sigma (strong) and pi (weak).

      Important Points

      Calcium Oxide:

      • Its formula is CaO
      • It is an ionic compound.
      • It is a white or greyish white solid substance.
      • It can absorb carbon dioxide from the atmosphere easily,

      Sodium Nitride:

      • Its formula is Na3N
      • It is an ionic compound.
      • It has a gap that is usually found in semiconductors.
      • It is formed from metal to non-metal interactions.

      Silicon Carbide:

      • Its formula is SiC.
      • Silicon carbide has a strong covalent bond between them.
      • It is also known as the covalent network solid.
      • It has oxidation resistance and thermal shock resistance.

      Zinc Sulphide:

      • Its formula is ZnS
      • It is an ionic compound.
      • It is usually black in colour due to various impurities and is thus used as a pigment.
      • It is used as a window in optics.
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