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What is the maxinum covalency of oxygen...

What is the maxinum covalency of oxygen ? Give examples.

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Oxygen usually forms two bonds. Its valency cannot be expanded due to lack of vacant d-orbitals . However, the maximum covalency of oxygen is three, due to an additional dative bond formed by oxygen using one of its lone pairs.
Hydronium ion, `H_3O^(+)` has two covalent bonds and one coordinate covalent bond formed by oxygen atom. diethyl oxonium ion, `(C_2H_5)_(2) OH^(+)` also has three bonds formed by oxygen.
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NARAYNA-16 TH GROUP ELEMENTS -EXERCISE - 4 NCERT EXAMPLERS/H.O.T.S.
  1. What is the maxinum covalency of oxygen ? Give examples.

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  2. The sulphur molecule (S(8)) can be represented as a

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  3. The boiling points of H2O, H2S , H2Se and H2Te are in the following or...

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  4. In the laboratory H(2)S is prepared by the action of

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  5. Why is H(2)S less acidic than H(2)Te ?

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  6. Oxyen is more eletrongative than sulphur, yet H(2)S is acidic while H(...

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  7. Cyclic trimer structure of SO(3) contains:

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  8. Iron sulphide is heated in air to form A, an oxide of sulphur. A is d...

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  9. Which of the following equations represents the oxidising action of su...

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  10. One gas bleaches the colour of flowers by reduction, while the other b...

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  11. SO3 gas can be identified by exposing it to the

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  12. Mustard gas can be prepared by the reaction of ethylene with

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  13. When cobalt trifluoride is treated with sulphur, the compound formed i...

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  14. Identify the correct sequence of increasing number of pi-bonds in strc...

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  15. Which of the following acids doesnot exists in the free form?

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  16. Which compound on heating alone does not form O(2)?

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  17. Oxygen gas can be prepared from solid KMnO4 by

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  18. Which of the following is not oxidised by O3?

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  19. Number of volumes of O2 formed when 3 volumes of Ozone decomposes

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