1.

Two inorganic compounds A and B were heated in a dry test tube. A evolved a colourless gas which turned lead acetate paper black and B evolved a gas which turned lime water milky. The anions in A and B respectively are :

Answer»

`SO_(3)^(2-), CO_(3)^(2-)`
`S^(2-), CO_(3)^(2-)`
`PO_(4)^(3-), HSO_(3)^(-)`
`S^(2-), NO_(3)^(-)`

ANSWER :B


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