wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

When an electric current is passed through acidified water, 112 ml of hydrogen gas at STP collects at the cathode in 965 seconds. What is the current passed, in ampere?

A
1.0
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
0.5
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
0.1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
2.0
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B 1.0
At STP, 22.4 litres=1mole of H2 gas=2g of H2 gas.

112 ml of H2 gas contains 2×11222.4×103=0.01g of H2 gas

Now,
2H++2eH2

According to Faraday's law,
nF=1mole

where, F= Faraday's constant=96500 C
& n=numberofelectrons=2

1 mole deposits 2×96500C

0.01g deposits 2×96500×0.012=965 C

Current =ChargeTime=965965
=1Ampere

Hence, option (A) is correct.


flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Faraday's Laws
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon