Chemistry - Salt Analysis Question with Solution | TestHub
A metal ion (M) solution neither form precipitate with dilute HCl, nor with in acidified aqueous solutions but produces 9 gram black precipitate(X) in alkaline medium with . Black precipitate X is completely dissolved in aqua regia. The aqueous solution obtained after treatment with aqua regia is neutralised with ammonium hydroxide and then acidified with acetic acid and filtered. In the filtrate strong solution of potassium nitrite is added, which gives yellow precipitate. In the last reaction, a paramagnetic gas is released as a byproduct.
Calculate the number of moles of paramagnetic gas evolved in the last reaction.
Given molar mass (gm/mol.) ⇒ H = 1 , N = 14 , O = 16 , S = 32 , Cl = 35.5 , K = 39 , Co = 58 Zn = 65 , Cu = 63.5 , Mn = 55 , Fe = 56 , Sn = 119 , Pb = 207 , Ni = 58.6 , Cd = 112.5 , Hg = 200
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