Excess of KI reacts with CuSO4 solution and Na2S2O3 solution is added to it. Which of the statements is incorrect foe the reaction?
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., .
Oxidation number of sodium in sodium amalgam is
In the given reaction,
X, Y, Z are
Which will be the proper alternative in place of A in the following equation.
Number of moles of K2Cr2O7 reduced by 1 mole of Sn2+ is
The values of x and y in the following redox reaction,
In the standardization of Na2S2O3 using K2Cr2O7 by iodometry, the equivalent weight of K2Cr2O7 is
When KMnO4 acts as an oxidising agent and ultimately forms , then the number of electrons transferred in each case respectively is
For decolourization of 1 mole of KMnO4, the moles of H2O2 required is
The above equation balances when
The number of moles of KMnO4 reduced by one mole of KI in alkaline medium is