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(i) A black mineral (A) on treatment w...

(i) A black mineral (A) on treatment with dilute sodium cyanide solution in present of air gives a clear solution of (B) and (C ).
(ii) The solution of (B) on reaction with zinc gives precipitate of a metal (D).
Identify (A) and (D) and explain the reactions of steps (i) and (ii).

Text Solution

AI Generated Solution

To solve the problem step by step, we will identify the black mineral (A) and the metal precipitate (D), and explain the reactions involved in each step. ### Step 1: Identify the Black Mineral (A) The black mineral mentioned in the question is likely to be silver sulfide (Ag₂S). This mineral is known for its black color and is commonly found in nature. ### Step 2: Reaction of Mineral A with Dilute Sodium Cyanide When silver sulfide (Ag₂S) is treated with dilute sodium cyanide (NaCN) in the presence of air, a complex compound is formed. The reaction can be represented as follows: ...
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