निम्न अभिक्रियाओं का अन्तिम उत्पाद .D. की पहचान कीजिए।
`Na_(2)CO_(3) overset(SO_2) rarr A overset(Na_2CO_3) rarr B overset(-S("तत्व"))underset(Delta) rarr C overset(I_2)rarr D`

Options

A. `Na_(2SO_(3)`
B. `Na_(2)S_(2)O_(3)`
C. `Na_(2)S_(4)O_(6)`
D. `NaHSO_(3)`

Answer

C

Explanation

`Na_(2)CO_(3) + 2SO_(2) + H_(2)O rarr underset(A)(2NaHSO_3) + CO_2`
`2NaHSO_(3) + Na_(2)CO_(3) rarr underset(B)(2Na_(2)SO_(3)) + H_(2)O + CO_2`
`underset(B)(Na_2SO_3 + S) rarr underset(C)(Na_2S_2O_3)`
`2Na_(2)S_(2)O_(3) + I_2 rarr underset(D)(Na_(2)S_(4)O_(6)) + 2Nal`