A colourless water-soluble compound on strong heating liberates a brow – InterviewSolution

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1.	A colourless water-soluble compound on strong heating liberates a brown colored gas and leaves a yellow residue that turns white on cooling. An aqueous solution of the original solid gives a white precipitate with (NH_(4))_(2)S. The original solid is :
Answer» `ZN(NO_(3))_(2)` `CA(NO_(3))_(2)` `AL(NO_(3))_(3)` `NaNO_(3)` Answer :A

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