Question

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

Solution

Correct option is

CuI2 is formed

 

   

          +2                 0                +2.5

Thus, I2 is reduced, Na2S2O3 is oxidised and Cu2I2 is formed. Therefore, CuI2 is not formed, i.e., .

SIMILAR QUESTIONS

Q1

Oxidation number of sodium in sodium amalgam is

Q2

 

In the given reaction,

   

X, Y, Z are

Q3

 

Which will be the proper alternative in place of A in the following equation.

Q4

Number of moles of K­Cr2O7 reduced by 1 mole of Sn2+ is

Q5

 

The values of x and y in the following redox reaction,

Q6

In the standardization of Na2S2O3 using K2Cr2O7 by iodometry, the equivalent weight of K2Cr2O7 is

Q7

When KMnO4 acts as an oxidising agent and ultimately forms , then the number of electrons transferred in each case respectively is

Q8

For decolourization of 1 mole of KMnO4, the moles of H2O2 required is

Q9

 

  

The above equation balances when

Q10

The number of moles of KMnO4 reduced by one mole of KI in alkaline medium is