Question

Diagram shows the apparatus set-up of a Daniell cell.

Which statements are true about Daniell cell?
I Zinc plate becomes thinner
II Silver atoni releases electron to form silver ion, Ag+
III The silver plate acts as the negative terminal IV Electron flows from zinc plate to silver plate through the external circuit
A I and II
B I and IV
C II and III
D III and IV
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Answer 1

B is correct

Statement 1 is correct

Zinc metal deposits electrons on the anode and goes as Zn2+ into the electrolytic solution so the plate becomes thinner

Statement 2 is incorrect

Silver has a negative reduction potential so it takes electrons and deposit as silver metal on the cathode

Statement 3 is incorrect

The silver plate has an electron deficiency and behaves as the positive terminal , while the zinc plate has to be electron rich and hence is the negative terminal or the anode

Statement 4 is correct

electron flows from zinc plate to silver plate in the external circuit

also check the attachment for reference