Chemistry-
General
Easy

Question

Sulphide mineral +CN to the power of minus rightwards arrow with straight O subscript 2 on top open square brackets M left parenthesis CN right parenthesis subscript 2 close square brackets to the power of minus 2 open square brackets M left parenthesis CN right parenthesis subscript 2 close square brackets to the power of minus plus Zn not stretchy rightwards arrow open square brackets Zn left parenthesis CN right parenthesis subscript 4 close square brackets to the power of 2 minus end exponent plus 2 M M

 can be

  1. Mg, Ag, Au

  2. Ag, Au

  3. Pt, Au

  4. Pt, Ag

The correct answer is:

Ag, Au

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