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Physical and Chemical Properties of Hydrogen

Excess of K...

Question

Excess of $K I$ reacts with $C u S O_{4}$ solution, and ${N a}_{2} S_{2} O_{3}$ solution is added to it. Which of the following statements is incorrect for the reaction?

Evolved

I_{2}

is reduced

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C u I_{2}

is formed

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{N a}_{2} S_{2} O_{3}

is oxidised

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{C u}_{2} I_{2}

is formed

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Solution

The correct option is B $C u I_{2}$ is formed
The statement (B) is incorrect.
$C u_{2} I_{2}$ and not $C u I_{2}$ is formed.
$K I$ reacts with copper sulphate to forn cuprous iodide
$2 C u S O_{4} + 4 K I \to C u_{2} I_{2} + 2 K_{2} S O_{4} + I_{2}$
The liberated iodide is reduced with sodium thiosulphate which itself is oxidized.
$I_{2} + 2 N a_{2} S_{2} O_{3} \to 2 N a I + N a_{2} S_{4} O_{6}$

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Similar questions

{C u S O}_{4}

+ KI

\to

{C u I}_{2}

{C u I}_{2}

\to

{C u}_{2} I_{2}

I_{2}

I_{2}

{N a}_{2} S_{2} O_{3} \to

{N a}_{2} S_{4} O_{6}

+ NaI

In this reaction, Which of the following product does not exit?

Excess of KI reacts with $C u S O_{4}$ solution and then $N a_{2} S_{2} O_{3}$ solution is added to it. Which of the following statement is incorrect from this reaction

{N a}_{2} S_{2} O_{3}

reacts with

{C l}_{2}

to form

{N a}_{2} {S O}_{4}, H C l

and

X - -

. Which one of the following is

X - -

Q. In the reaction,

2 {N a}_{2} S_{2} O_{3} + I_{2} \to {N a}_{2} S_{4} O_{6} + 2 N a I

the equivalent weight of

{N a}_{2} S_{2} O_{3}

(m o l . w t . = M)

is equal to ______.

Q. 3 gm of

{C u S O}_{4}

5 H_{2} O

sample containing inert impurity reacted with KI and the liberated

I_{2}

reacted with

10 m l

0.5 M

{N a}_{2} S_{2} O_{3}

. The % purity of

C u S O_{4} .5 H_{2} O

will be:

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Excess of KI reacts with CuSO4 solution, and Na2S2O3 solution is added to it. Which of the following statements is incorrect for the reaction?

The correct option is B CuI2 is formedThe statement (B) is incorrect. Cu2I2 and not CuI2 is formed.KI reacts with copper sulphate to forn cuprous iodide2CuSO4+4KI→Cu2I2+2K2SO4+I2The liberated iodide is reduced with sodium thiosulphate which itself is oxidized. I2+2Na2S2O3→2NaI+Na2S4O6

Excess of $K I$ reacts with $C u S O_{4}$ solution, and ${N a}_{2} S_{2} O_{3}$ solution is added to it. Which of the following statements is incorrect for the reaction?