pBlock ElementsII - Result Question 80

####75. Identify the compounds $A, B, C, D$

$$ Na _2 CO _3 \xrightarrow{SO _2} A \xrightarrow{Na _2 CO _3} B \xrightarrow[\Delta]{\text { Elemental } S} C \xrightarrow{I _2} D $$

and give oxidation state of sulphur in each compounds.

$(2003,4 M)$

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Solution:

  1. $A=\stackrel{+4}{NaH S} O _3 ; B=\stackrel{+4}{Na _2} \stackrel{4}{S} _3 ; C=\stackrel{+2}{Na _2} \stackrel{+2}{S _2} O _3 ; D=\stackrel{+2.5}{Na _2}{ } _S^{4} O _6$


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