Question
Chemistry Question on Chemical bonding and molecular structure
The number of moles of electrons passed when a current of 2A is passed through a solution of electrolyte for 20 minutes is:
A
(A) 4.1×10−4 mole
B
(B) 1.24×10−2 mole
C
(C) 2.487×10−2 mole
D
(D) 2.487×10−1 mole
Answer
(C) 2.487×10−2 mole
Explanation
Solution
Explanation:
Current passed, I=2ATime for which current is passed t=20 min=20 min×60s/min=1200 sSo, total charge flown, Q=It=2A×1200 s=2400CNumber of moles of electrons n=Q96500=2400C96500C/mole−=2.487×10−2 molesHence, the correct option is (C).