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What happends when : (a) Aqueous solution of lead acetate and sodium sulphide are mixed with each, (b) A few drops of sodium nitroprusside are added to the aqueous solution containing sodium suphide. (c) An aqueous solution containing sodium iodide is treated with a few drops of CS_(2) followed by excess of chlorine water. (d) Phoshorus is fused with sodium peroxide |
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Answer» Solution :(a) A black precipitate of lead sulphide is formed. `Na_(2)S + underset("Lead acetate")((CH_(3)COO)_(2) Pb rarr underset(("Black ppt")) (PbS )+ underset("Sod. Acetate")(2CH_(3)COONA)` (B) The solution acquires a violet colour. `Na_(2)S + underset("Sod. nitroprusside")(Na_(2) [Fe(CN)_(5)NO]) rarr underset(("violet colour"))(Na_(4) [Fe(CN)_(5) NOS])` (c) The oily layer of `CS_(2)` acquires a violet colour. chlorine being more reactive than iodine displaces the same from the salt solution `2NaI + Cl_(2) rarr 2NaCl + I_(2)` (d) Sodium phosphate is formed on fusion. `5Na_(2) O_(2) + 2P overset(("Fuse"))rarr underset("Sod. phosphate")(2Na_(3)PO_(4) +2Na_(2)O)` |
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