Explanation
Fe3+ does not react with I- whereas all other ions react with I- giving their salts.
NaNO3 does not react with AgCl.
COCl2 is phosgene. It does not contain metal ion .
Fe2+ gives blue ppt. with pot. ferrccyanide of prussian blue complex.
Cr3+ (3d3) gives colour (green) to an aqueous solution
Marble i.e, CaCO3 will not affect Br2 colour
I2 cannot oxidise , F‒ and Br‒ to their respective gaseous Cl2, F2 and Br2 products
Larger the value of solubility product, higher is the solubility thus solubility decreases from HgS to PbS
Only NH3 gas gives deep blue solution with CuSO4.NH3 is obtained from reaction of nitride of the metal with water
Cd2+ is an group II A which is precipited as CdS in HCl medium
Higher the solubility product (Ksp) more is the solubility of the salt.
The phenomenon of efforescence involves spontaneous loss of water molecules from a crystal
Ksp for Na2S > Ksp for ZnS > Ksp for CuS
Out of AgCl and AgI precipitate, only AgCl is soluble in NH3 solution due to the formation of [Ag (NH3)2] Cl complex.
Cu metal and CdS both ppt. are obtained.
Cu2+ gives K3[Cu(CN)4 and Cd2+ gives K2[Cd(CN)4].
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