Class 11 Chemistry Classification of Elements and Periodicity in Properties Valency and oxidation state

Difficult

The lowest oxidation number of an atom $B$ in a compound $A_2 B$ is $-2$. The number of electrons in its valence shell is:

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A
$4$
B
$5$
C
$6$
D
$7$

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Class 11 Questions

Class 11

Chemistry Questions

Chapter

Classification of Elements and Periodicity in Properties

Subtopic

Valency and oxidation state

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