Question

19. In the equation,
4M +8CN + 2H20+02 - 4[M(CN) 2) + 40H
Identify the metal M:
(b) Iron
(a) Copper
(d) Zinc
(c) Gold
no The number of atoms in 4.25 g of NH, is approximately:​

Answer 1

Answer:

iron

Explanation:

shsbu is knevi Japan Bob hekmatyar o3b5 the water

Answer 2

Answer:

Gold

Explanation:

least seactive metals like Silver & Gold are obtained by Cyanide process

In this process, the impure metal treated with NaCN (Solution) & the air is passed.

Therefore, The metal is converted into the Goluble complex as :

4 Au + 8 CN- + 2H2O + O2 → 4 [AU (ON)2]- + 4OH-