## Question

### Solution

Correct option is

25 ml

Fe (II) → Fe (III) + e , ‘n’ factor = 1 ;

#### SIMILAR QUESTIONS

Q1

Calculate the molarity of KMnO4 solution, 20 mL of which is just sufficient to oxidize 0.238 g of U4+ in acidic medium according to the reaction (atomic mass of U = 238)

Q2

50 mL of 0.04 M solution of sodium sesquicarbonate (Na2CO3.NaHCO3.2H2O) is titrated with 0.05 M HCl. V1 mL of HCl is used when phenolphthalein acts as indicator and V2 mL of HCl is used when methyl orange is the indicator in the two separate titrations. The two titration values V1and V2 differ by

Q3

0.5 g sample of oxalate salt required 30ml of 0.05 M KMnO4 in acidic medium for complete oxidation. The percent of oxalate ion in the sample is

Q4

20 mL of 0.1 M FeC2O4 solution is titration with 0.1 M KMnO4 in acidic medium. Volume of KMnO4 solution required to oxidise FeC2O4 completely is

Q5

To neutralize completely 20ml of 0.1 M phosphorous acid 40ml of KOH was required. What volume of this KOH solution will be required to neutralize 0.66 g of H3PO2?

Q6

10ml of KHC2O4 solution requires 10 ml of NaOH for complete neutralization. 10 ml of same KHC2O4 solution is oxidized by 10 ml of KMnO4 solution in acidic medium. Molarity of KMnO4 solution is

Q7

The molarity, molality and density of a solution are denoted by ω, x and yg ml–1 respectively. If molecular mass of the solute is z, then which of the following relation is correct?

Q8

KMnO4 oxidizes Xn+ into,  itself changing to Mn2+ in acid solution. 2.68 × 10–3 mol of Xn+ require  mol of KMnO4. The value of n is

Q9

To 1 mole of pyrophosphoric acid (H4P2O7) in aqueous solution 2 mole of NaOH are added. The salt formed is

Q10

100ml of 0.01 M KMnO4 oxidizes 10ml of H2O2 sample in acidic medium. The volume strength of H2O2 sample is