Home
Class 12
CHEMISTRY
A layer of chromium metal 0.25 mm thick ...

A layer of chromium metal 0.25 mm thick is to be plated on an auto bumper with a total area of 032`m^2` from a solution cantaining `CrO_4^(2-)`? What current flow is required for this electroplating if the bumper is to be plated in 60s ? The density of chromium metal is 7.20g/`cm^3`
a. `4.9xx10^3`A
b. `1.78xx10^3`A
c. `5.3xx10^4`A
d. `10.69xx10^4`A

A

`4.9 xx10^3A`

B

`1.78xx10^3 A`

C

`5.3 xx10^4 A`

D

`10.69 xx10^6A`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Similar Questions

Explore conceptually related problems

Add 6.75xx10^3 cm to 4.52xx10^2 cm.

A solution contains 1.4 xx 10^(-3)M AgNO_(3) . What concentration of KC1 will be required to initiate the precipitation of AgC1 ? K_(sp) AgC1 = 2.8 xx 10^(-10)

What is the energy (kJ/mol) associated with the de-excitation of an electron from n=6 to n=2 in He^(+) ion? (a) 1.36xx10^(6) (b) 1.36xx10^(3) (c) 1.16xx10^(3) (d) 1.78xx10^(3)

What is the ionization constant of an acid if the hydronium ion concentration of a 0.40 M solution is 1.40xx10^(-4) M? (a) 1.96xx10^(-8) (b) 1.22xx10^(-9) (c) 4.90xx10^(-8) (d) 1.40xx10^(-6)

Electrolysis of dilute aqueous NaCl solution was carried out by passing 10mA current. The time required to liberate 0.01mol of H_(2) gas at the cathode is (1F=96500C mol ^(-1)) (a) 9.65xx10^(4)s (b) 19.3xx10^(4)s (c) 28.95xx10^(4)s (d) 38.6xx10^(4)s

A solution containing 2.7 xx 10^-3 mol of A^(2+) irons required 1.6 xx 10^(-3) mole of MnO_4^- for the oxidation of A^(2+) to AO_3^- the medium used is :

How long a current of 3A has to be passed through a solution of silver nitrate to coat a metal surface of 80cm^(2) with a 0.005-mm- thick layer ? The density of silver is 10.5g cm^(-3) .

A metallic wire having length of 2 m and weight of 4xx10^(-3) N is found to remain at rest in a uniform and transverse magnetic field of 2xx10^(-4) T . Current flowing through the wire is :

What is the density of lead under a pressure of 2xx10^(8)Nm^(-2) , if the bulk modulus of lead is 8xx10^(9)Nm^(-2) and initially the density of lead is 11.4 g cm^(-3) ?

What is the density of lead under a pressure of 2xx10^(8)Nm^(-2) , if the bulk modulus of lead is 8xx10^(9)Nm^(-2) and initially the density of lead is 11.4 g cm^(-3) ?