Question

 

In iodometric estimation of Cu2+ ions, the following reactions take place

If 100mL of CuSO4 solution added to an excess of KI requires 50mL of 0.2 M Na2S2O3, the molarity of CuSO4 solution is

Solution

Correct option is

0.1

 

Eq. mass of CuSO4 = Molar mass /(2 – 1).

SIMILAR QUESTIONS

Q1

When ethane is  burnt in presence of excess of oxygen, the oxidation number of carbon changes by

Q2

In a reaction, 3mol of electrons are gained by 1 mol of HNO3. Assuming no change in oxidation state of hydrogen the possible product obtained due to reduction will be

Q3

Ratio of mols of Fe(II) oxidised by equal volumes of equilmolar KMnO4and K2Cr2O7 solutions in acidic medium will be

Q4

The oxidation numbers of most electronegative element in the products of hydrolysis of peroxydisulphuric acid are

Q5

 

For the redox reaction  the correct coefficients of the reactants for the balanced equation are

                                            

Q6

The equivalent  mass of Na2CrO4 used as oxidant in acidic medium is (Cr = 52)

Q7

The equivalent masses of Na2CO3 when it is titrated with HCl using phenolphthalein and methyl orange indicators in separate experiments are

Q8

Which of the following can be reduced by SnCl2 solution

Q9

 

Hydrazine reacts with KIO3 in presence of HCl as

The equivalent masses of N2H4 and KIO3 respectively are

Q10

0.66 g H3PO2 will require x mL of 0.1 NaOH for complete neutralization .x is