1.

In the following reactionNaOH+SrarrA+Na_(2)S+H_(2)O, A

Answer»

`Na_(2)SO_(4)`
`Na_(2)SO_(3)`
`Na_(2)S`
`Na_(2)S_(2)O_(3)`.

SOLUTION :`4S+6NaOH rarrNa_(2)S_(2)O_(3)+2Na_(2)S+3H_(2)`


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