pBlock ElementsII - Result Question 93

####89. Give reasons in two or three sentences only. Sulphur dioxide is a more powerful reducing agent in the alkaline medium than in acidic medium.

(1992, 2M)

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Solution:

  1. SO2 acts as reducing agent on account of following reaction :

SO2+2OHSO42+2H++2e

Hence, the above reaction proceeds in forward direction on increasing concentration of HOion. H+is on product side, adding H+retards the reaction by sending it in backward direction.



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