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Q.

What is the valency of sulphur in  SO2  molecule

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a

4

b

6

c

2

d

8

answer is B.

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Detailed Solution

Number of hydrogen atoms (or) chlorine atoms (or) double the number of oxygen atoms with which one atom of an element combines is called its valency. Here two oxygen atoms are combined with sulphur hence its valency is 4
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