UPSEE 2019 Solved Paper

Atomic mass of Zn=65.4
Atomic mass of Ag=108
Atomic mass of Cu=63.5
Ag++

e−

1F

→

Ag

1mol

∵108g of Ag is deposited by=96500C
1.45g of Ag will be deposited by
=

96500×1.45

108

C=1295.6C
Since, the reaction related to deposition of Cu is
Cu2++

2e−

2F

→

Cu

63.5g

∵2×96500C electricity deposits 63.5g of Cu
∴1295.6C electricity will departs of
Cu=

63.5×1295.6

2×96500

=0.42g
Since, the reaction related to deposition of zinc is
Zn2++

2e−

2F

→

Zn

65.4g

∵2×96500C electricity deposits 65.4g of Zn.
∴1295.6 C electricity will deposit of
Zn=

65.4×1295.6

2×96500

=0.44g
So, option (c) Zn=0.44g and Cu=0.42g is correct.