Can A Solution Of 1 M Copper Sulphate Be Stored In A Vessel Made Of Nickel Metal? Given That . Or Is It Possible To Store Copper Soulphate Solution In A Nickel Vessel?

0.01 mole of Fe₃O₄ is treated with excess of KI solution in presence of dilute H₂SO₄ whereby iron is reduced to Fe²⁺ along with liberation of iodine. What volume of 0.1 M Na₂S₂O₃ will be needed to reduce the librated iodine?

In which of the following reaction, oxidation number of N remains unchanged?

KMnO₄ acts as a strong oxidizing agent in acidic medium. The reaction that occurs is

What will be the effect on the electrode potential of a half-cell represented as  if the concentration of H⁺ ion is doubled in solution?

In which of the following oxidation state of phosphours is + 3?

Determine the volume of M/8 KmnO₄ solution required to react completely with 25.0 cm³ of M/4 FeSO₄ solution is acidic medium.

Calculate the concentration of hypo (Na₂S₂O₃.5H_­2O) solution in g dm^–3 if 10.0 of this solution decolourised 15 mL of M/40 iodine solution.

0.5 g of an impure sample of oxalate was dissolved in water and the solution made to 100 ml. On titration 10 ml of this solution required 15 ml of N/20 KMnO₄ solution. Calculate the percentage of pure oxalate in the sample.

Predict whether zinc and silver react with 1 M sulphuric acid to give out hydrogen or not. Give that the standard potentials of zinc and silver are – 0.76 volt and +0.80 volt respectively.

0.2 of sample H₂O₂ reduced 20 ml of 0.1 M KMnO₄ solution in acidic medium. What is the percentage purity of H₂O₂?

16.6 g of pure potassium iodide was dissolved in water and the solution was made up to one litre. V cm³ of this solution was acidified with 20 cm³of 2 M HCl. The resulting solution required 10 cm³ of decinormal KIO₃for complete oxidation of I^– ions to ICl. Find out the value of V.