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Chemistry
Assertion (A) Oxygen has a covalency of four. Reason (R) d-orbitals are absent in oxygen
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Q.
Assertion (A)
Oxygen has a covalency of four.
Reason (R)
$d$-orbitals are absent in oxygen
The p-Block Elements - Part2
A
Both $A$ and $R$ are correct; $R$ is the correct explanation of $A$.
B
Both $A$ and $R$ are correct; $R$ is not the correct explanation of $A$.
C
$A$ is correct; $R$ is incorrect.
D
$R$ is correct; $A$ is incorrect.
Solution:
The absence of $d$-orbitals in oxygen limits its covalency to four and it rarely exceeds two.