Question
Question: How long will it take for a current of 3 Amperes to decompose 36 g of water? (Eq. wt. of hydrogen is...
How long will it take for a current of 3 Amperes to decompose 36 g of water? (Eq. wt. of hydrogen is 1 and that of oxygen 8)
A
36 hours
B
18 hours
C
9 hours
D
4.5 hours
Answer
36 hours
Explanation
Solution
Eq. wt. of H2O=1+8=9. Hence 9 g is decomposed by 96500 C. So 36 g of water will be decomposed by
Q=96500×4C
Hencet=IQ=396500×4S=128666.66sec. =35.7hrs⋍ 36hrs.