A layer of chromium metal 0.25 mm thick is to be plated on an auto bumper with a total area `0.32m^(2)` from a solution containing `CrO_4^(2-)` ? What current flow is required for this electroplate if bumper is to be plated in 60s ? The density of churomnium metal is 7.20g / `cm^(3)`
A
`4.9xx10^3`A
B
`1.78xx10^3`A
C
`5.3xx10^4`A
D
`10.69xx10^6`A
Text Solution
Verified by Experts
The correct Answer is:
D
Topper's Solved these Questions
ELECTROCHEMISTRY
NARENDRA AWASTHI|Exercise Level 1 (Q.1 To Q.30)|1 Videos
ELECTROCHEMISTRY
NARENDRA AWASTHI|Exercise Level 1 (Q.91 To Q.120)|1 Videos
DILUTE SOLUTION
NARENDRA AWASTHI|Exercise Level 3 - Match The Column|1 Videos
The volume of 0.1 M HCl required in mL to neutralise 20 mL of a solution containing 0.106 g of Na_(2)CO_(3) is
A solenoid 60 cm long and of radius 7.0 cm has 3 layers of windings of 300 turns each. A 2.0 cm long wire of mass 2.5 g lies inside the solenoid (near its centre) normal to its axis, both the wire and the ais of the solenoid are in the hoorizontal plane. The wire is connected through two lead parallel to the axis of the solenoid to an external battery which supplies a current of 6.0 A in the wire. What value of current (with appropriate sense of circulation) in the windings of the solenoid can support the weight of the wire ? g=9.8 m s^(-2) .
A circular coil of 20 turns and radius 10 cm is placed in a uniform magnetic field of 0.10 T normal to the plane of the coil. If the current in the coil is 5.0 A, what is the (a) total torque on the coil, (b) total force on the coil, (c) average force on each electron in the coil due to the magnetic field? (The coil is made of copper wire of cross-sectional area 10^(-5) m^2 , and the free electron density in copper is given to be about 10^29 m^(-3) .)
Two glass plates are separated by a thin layer of water of thickness 0.01 mm. If the wetted area corresponding to each plate be 30cm^(2) , calculate the force required to pull the plate apart. Surface tension of water is 75 dyne/cm.
0.066 g of metal was deposited, when a current of 2 A is passed through a metal ion solution for 100s. What is the electrochemical equivalent (in g-C^(-1) ) of the metal?