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JEE Advanced 2020 Full Test 5 Paper 2
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© examsnet.com
Question : 21
Total: 54
In a Cu voltameter, mass deposited in 30 seconds in 100 grams. Carefully analyse the currenttime graph shown below and identify the incorrect statement
Electrochemical equivalent for Cu is 50
A constant current of 66.66 mA would also discharge the same amount in the same time.
33.33 grams got discharged in 10 seconds.
50 grams got discharged in 15 seconds.
Validate
Solution:
Area under curve
=
charge passed
=
2
coulombs
w
=
Z
i
t
=
Z
=
w
q
=
100
2
=
50
For constant current;
q
=
i
t
⇒
2
=
i
×
30
i
=
2
30
A
=
200
3
m
A
© examsnet.com
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