Chemistry - Salt Analysis Question with Solution | TestHub

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