KVPY2013ChemistryElectrochemistry
The density of eq. wt of a metal are 10.5 gcm ⁻³ and 100 , respectively. The time required for a current of 3 amp to deposit a 0.005 ~mm thick layer of the same metal on an area of 80 ~cm ² is closest to
Options
- A120 ~s
- B135 ~s
- C67.5 ~s
- D270 ~s
Correct answer
B. 135 ~s
Step-by-step solution
w = E i t 96500 w = 100 3 t 96500 ~d = m V w =10.5 80 5 10⁻⁴=42 10⁻²42 10⁻²= 100 3 t 96500 t =135 sec