A certain compound X when treated with copper sulphate solution yields a brown precipitate. On adding hypo solution, the precipitate turns white. The compoundXis

Question

A certain compound X when treated with copper sulphate solution yields a brown precipitate. On adding hypo solution, the precipitate turns white. The compoundXis (A) K2CO3 (B) KI (C) KBr (D) K3PO4

Tardigrade Admin · Accepted Answer

When potassium iodide is reacted with CuS04, it gives iodine gas which is brown colour. This iodine react with sodium thiosulphate and form white precipitate of sodium tetrathionate.

2 C u S O_{4} + 4 K I ⟶ K_{2} S O_{4} + I_{2} + 2 C u I

2 N a_{2} S_{2} O_{3} + I_{2} ⟶ N a_{2} S_{4} O_{6} + 2 N a I

Q. A certain compound X when treated with copper sulphate solution yields a brown precipitate. On adding hypo solution, the precipitate turns white. The compoundXis

$K_{2} C O_{3}$

KI

KBr

$K_{3} P O_{4}$

Q. A certain compound X when treated with copper sulphate solution yields a brown precipitate. On adding hypo solution, the precipitate turns white. The compoundXis

K2​CO3​

KI

KBr

K3​PO4​

When potassium iodide is reacted with CuS04, it gives iodine gas which is brown colour. This iodine react with sodium thiosulphate and form white precipitate of sodium tetrathionate. 2CuSO4​+4KI⟶K2​SO4​+I2​+2CuI 2Na2​S2​O3​+I2​⟶Na2​S4​O6​+2NaI

$K_{2} C O_{3}$

$K_{3} P O_{4}$