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Q.

SO2 can be removed by using the followingSO2 +2H2S→   2H2O +3SSO2 +Na2SO3 +H2O →   2NaHSO3This is called

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a

synergistic process

b

non-regenerative process

c

desulphonation process

d

regenerative process

answer is D.

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Detailed Solution

SO2 content of the air can be removed by using(a) H2S gas which precipitates as sulphur2H2S +O2→   2H2O +3S(b) Na2SO3 which dissolves SO2Na2SO3 +H2O+SO2 →   2NaHSO3
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