Chemistry
Identify the salts X and Y from the following observations.
(a) Salt X is white in colour. On strong heating, it produces buff yellow residue and liberates reddish brown gas. Solution of salt X produces chalky white insoluble precipitate with excess of ammonium hydroxide.
(b) Salt Y is black in colour. On reacting with conc. HCl, it liberates a pungent greenish yellowish gas which turns moist starch iodide paper blue black.
Practical Chemistry
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Answer
(a) Lead nitrate
(b) Manganese dioxide
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