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Q.

The total number of valence electrons present in SO42- ion

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a

16

b

28

c

32

d

30

answer is A.

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Detailed Solution

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In this ion, neutral oxygen and sulphur atom contain 6 valence electrons. Negatively charged oxygen atoms contain 7 valence electrons.

So the total electron count= (3×6)+(2×7)=32. 

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