Number Of Moles Of K­2­Cr2O7 reduced By 1 Mole Of Sn2+ is

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.

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?

0.2 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.

Both  (aq) can be used to titrate Fe²⁺ (aq). If in a given titratoion, 24.50 cm³ of 0.1 M  were used, then what volume of 0.1 M  solution would have been used for the same titration?

1.1 g of a sample of copper ore is dissolved and Cu²⁺ (aq) is treated with KI. The iodine thus liberated required 12.12 cm³ of 0.1 M Na₂S₂O₃solution for titration. What is the percentage of copper in the ore?

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.

The values of x and y in the following redox reaction,