In the equation
$$4M + 8C{N^ - } + 2{H_2}O + {O_2} \to 4{\left[ {M{{\left( {CN} \right)}_2}} \right]^ - } + 4O{H^ - }$$
Identify the metal $$M.$$ It is
A.
copper
B.
iron
C.
gold
D.
zinc
Answer :
gold
Solution :
This is cyanide process for gold $$\left( {M = Au} \right).$$
Releted MCQ Question on Inorganic Chemistry >> D and F Block Elements
Releted Question 1
When same amount of zinc is treated separately with excess of sulphuric acid and excess of sodium hydroxide, the ratio of volume of hydrogen evolved is