Current Electricity Charging Discharging Of Capacitors Question 77
Question: If 96500 coulombs of electricity liberates one gram equivalent of any substance, the time taken for a current of 0.15 amperes to deposite 20mg of copper from a solution of copper sulphate is (Chemical equivalent of copper = 32)
[Kerala (Engg.) 2002]
Options:
A) 5 min 20 sec
B) 6 min 42 sec
C) 4 min 40 sec
D) 5 min 50 sec
Show Answer
Answer:
Correct Answer: B
Solution:
$ m=Z,i,t $
Therefore $ 20\times {{10}^{-3}}=( \frac{32}{96500} ),\times 0.15\times t $
$ =6.7,min=6,min.42,sec $
BETA
