Question

give me a answer step by step.​

Answer 1

1)ROASTING

$2zns + 3o2 - - - >2 zno + 2so2$

$zno + c - - > zn + co$

we get impure zn

2)

$ag + nacn - - > {ag(cn)2} \: + na \\ {ag(cn)2} \: + zn - - > zn(cn)4 + ag$

3)

$zr \: + 2i2 - - > zri4$

heating ZrI4 at A very high temperature

$zri4 - - > zr + 2i2$

I hope this helps ( ╹▽╹ )