An aqueous solution of colourless metal sulphate M gives a white precipitate with $\mathrm{NH}_{4}…
An aqueous solution of colourless metal sulphate M gives a white precipitate with $\mathrm{NH}_{4} \mathrm{OH}$. This was soluble in excess of $\mathrm{NH}_{4} \mathrm{OH}$. On passing $\mathrm{H}_{2} \mathrm{~S}$ through this solution a white ppt. is formed.
The metal $\mathrm{M}$ in the salt is
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