The `E°(M^2+/M)`value for copper is positive (+0.34
V). What is the possible reason for this ?

The E_(M^(2+) // M)^@ for copper is positive (0.34 V). Copper is the only metal in the first series of transition elements showing this behaviour.

Peak value of an a.c. source is E_0 . What is its r.m.s. value?

Peak value of an a.c. source is E_0 . What is its r.m.s. value?

State the principle of production of e.m. waves. What is the value of velociy of these waves?

A cell of e.m.f. 4 V and of negligible internal resistance is connected in series with a potentiometer wire of length 400 cm. The e.m.f. of a Leelanche cell is found to be balacned at 150 cm from the positive end of the potentiometer wire. What is the e.m.f. of the Leclanche cell ?

The A.M. between two positive numbers is 34 and their G.M. is 16. find the numbers.

Why current is not possible, without the source of e.m.f?

From the fllowing half-cell reactions and their standard potentials ,what is the smallest possible standard e.m.f for spontaneous reactions? PO_4^(3-)(aq)+2H_2O(l)+2e^(-)toHPO_3^(2-)+3OH^(-)(aq), E^(@)=-1.05V PbO_2(s)+H_2O(l)+2e^(-)toPbO(s)+2OH^(-)(aq),E^(@)=+0.28 V