`SO_(2)` can be removed by using the following `SO_(2)+2H_(2)S rarr 2H_(2)O+3S`
`S_(2)+Na_(2)SO_(3)+H_(2)O rarr 2NaHSO_(3)`
This is called

Options

A. synergistic process
B. non-regenerative process
C. desuphonation process
D. regenerative process

Answer

D

Explanation

`SO_(2)` content of air can be removed by using
(a) `H_(2)S` gas which precipitates as sulphur
`2H_(2)S+O_(2) rarr 2H_(2)O+3S`
(b) `Na_(2)SO_(3)` which dissolves `SO_(2)`
`Na_(2)SO_(3)+H_(2)O+SO_(2) rarr 2NaHSO_(3)`.