Electrochemistr...

Which of the following metal do no evolve $${ H }_{ 2 }$$ gas from dil. acid?

How many electrons flow when a current of 5 amperes passed through a solution for 193 seconds?

If equal quantities of electricity are passed through three voltmeter containing $$FeSO_4$$, $$Fe_2(SO_4)_3$$ and $$Fe(NO_3)_2$$, then which of the following is not true?

The passage of a constant current through a solution of dilute $$H_2SO_4$$ with 'Pt' electrode liberated $$336cm^2$$ of a mixture of $$H_2$$ and $$O_2$$ at S.T.P. The quantity of electricity that was passed is:

The equilibrium constant for the following reaction at $$25^o$$C is $$2.9\times 10^9$$. Calculate standard voltage of the cell. 

A solution of $$Ni(NO_3)_2$$ is electrolyzed between platinum electrodes using a current of 5 amperes for 20 minutes. What mass of Ni is deposited at the cathode?

Heated saw dust catches fire when a drop of concentrated nitric acid is added to it. This is due to

Passage of three faradays of charge through an aqueous solution of $$AgNO_3, CuSO_4, Al(NO_3)_3$$ and $$NaCl$$ will deposit metals at the cathode in the molar ratio of:

On passing electricity through dil.$${ H }_{ 2 }{ SO }_{ 4 }$$ solution, the amount of substance liberated at the cathode and anode are in the ratio :

Consider the reaction : $$Cr_2O^{2-}_{7} + 14H^+ + 6e^- \rightarrow 2Cr^{3+} + 7H_2O$$.