Draw the diagram a of galvanic cell involving following reactions :
`Zn+Cu^(+) to Zn^(2+) +Cu` and answer the following questions:
(i) Label the cathode and anode
(ii) How does the e.m.f. of the cell changes with the decrease in the concentration of `Cu^(2+)` ions ?
(iii) What is the function of salt bridge in it?
(iv) Name the salt to be used in salt bridge.
(v) Write the reactions occurring at each electrode.
(vi) In which direction the electrons would flow in the external circuit?
(vii) How electrical neutrality is maintained in both the half cells?