Question

\[\ce{Au + CN^- + H2O + O2 -> [Au(CN)2]^- + OH^-}\]

The number of CN⁻ ions involved in the balanced equation is ______.

विकल्प

• 4

• 8

• 12

• 16

Answer 1

\[\ce{Au + CN^- + H2O + O2 -> [Au(CN)2]^- + OH^-}\]

The number of CN⁻ ions involved in the balanced equation is 8.

Explanation:

\[\ce{4Au + 8CN^- + 2H2O + O2 -> 4[Au(CN)2]^- + 4OH^-}\]