Question

 

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)

 

                         

Solution

Correct option is

0.02 M

 

= 6 – 4 = 2

= 7 – 2 = 5

 

SIMILAR QUESTIONS

Q1

If g is the mass of NaHC2O4 required to neutralize 100 mL of 0.2 MNaOH and y g that required to reduce 100 mL of 0.02 KMnO4 in acidic medium, then

Q2

A mixture of K2C2O4 and KHC2O4 required equal volumes of 0.1 M K2Cr2O7 for oxidation and 0.1 M NaOH for neutralization in separate titrations. The molar ratio of K2C2O4 and KHC2O4 in the mixture is :

Q3

An equilmolar mixture of Na2C2O4 and H2C2O4 required V1L of 0.1 M KMnO4 in acidic medium for complete oxidation. The same amount of the mixture required V2L of 0.1 M NaOH for neutralization. The ratio of V1 to V2 is

Q4

 

In an iodometric estimation, the following reactions occur

0.15 mol of CuSO4 of 80% purity was added to excess of KI solution and the liberated iodine required 12 mL 120mL of hypo. The molarity of hypo solution was

Q5

A mixture of NaOH and Na2CO3 required 25mL of 0.1 M HCl using phenolphthalein as indicator. However, the same amount of the mixture required 30mL of 0.1 M HCl when methyl orange was used as the indicator. The molar ratio of NaOH and Na2CO3 in the mixture was

Q6

A 1.70 g sample of H2O2 solution containing x% H2O2 by mass requires xmL of KMnO4 solution for complete oxidation under acidic condition. The molarity of KMnO4 solution is

Q7

What volume at STP of gaseous ammonia will be required to be passed into 100mL of 0.5 M H2SO4 to bring down its strength to 0.25 M?

Q8

20 mL of a solution containing Na2CO3 and NaHCO3 requires 10 mL of 0.1 N H2SO4 for neutralization using phenolphthalein as an indicator. Methyl orange is then added when a further 10 mL of 0.2 N H2SO4 is required. Molar concentration of Na2CO3 and NaHCO3 in the solution respectively are

Q9

A mixture containing 0.05 mol of K2Cr2O7 and 0.02 mol of KMnO4 was treated with excess of KI in acidic medium. The liberated iodine required 2.0 L of Na2S2O3 solution for titration. Concentration of Na2S2O3solution was

Q10

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