Doubt from salt analysis

#1


Q12 ans is B

#2

Salts of Ag Cu Cd Zn Co Ni are soluble in ammonia except AgI
So now we have to decide bent b and c
Both are soluble in excess NaOH ..
So now we have to decide by reaction given ..
Idk if both react with air
@Supreeta_Sen
@Viraam_Rao
Help!!

#3

Fe2+ isnt soluble in excess NaOH i guess

#4

Yep Fe2+ isn't soluble in Naoh.
Fe+2 is probably getting oxidised by air to Fe3+ in first step

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#5


Ask if you have any doubt.