Electrochemistry Test

Result

Electrochemistry Test - 33

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Weekly Quiz Competition

Question 1
4 / -1

When the sample of copper with zinc impurity is to be purified by electrolysis, the appropriate electrodes are

A
(a)

B
(b)

C
(c)

D
(d)
Question 2
4 / -1

A
Carbon can oxidise zinc

B
Oxidation of carbon is not possible

C
Oxidation of zinc is not feasible

D
Zinc can oxidise carbon
Question 3
4 / -1

In the electrolytic cell, flow of electrons is from

A
cathode to anode in the solution

B
cathode to anode through external supply

C
cathode to anode through internal supply

D
anode to cathode through internal supply
Question 4
4 / -1

The cell reaction of the galvanic cell Cu(s) |Cu²⁺ (aq)| |Hg²⁺ (aq)| Hg(l) is

A
Hg + Cu²⁺ → Hg²⁺ + Cu

B
Hg + Cu²⁺ → Hg⁺ + Cu⁺

C
Cu + Hg → CuHg

D
Cu + Hg²⁺ → Cu²⁺ + Hg

Solution
Question 5
4 / -1

The conductivity of a saturated solution of BaSO₄ is 3.06 × 10^-6 Ohm^-1 cm^-1 and its equivalent conductance is 1.53 ohm^-1 cm² equiv^-1 - The k_sp for BaSO₄ will be

A
4 × 10^-12

B
2.5 × 10^-9

C
2.5 × 10^-13

D
4 × 10^-6

Solution
Question 6
4 / -1

A conductivity cell having cell constant 8.76 cm^-1placed in 0.01 M solution of an electrolyte offered a resistance of 10000 ohms. What is the specific conductance of the electrolyte?

A
8.76 × 10⁴ ohm^-1 cm^-1

B
8.76 × 10^-4 ohm^-1 cm^-1

C
8.76 × 10^-2 ohm^-1 cm^-1

D
8.76 × 10² ohm^-1 cm^-1

Solution
Question 7
4 / -1

Molar conductivity of a solution is 1.26 × 10²Ω^-1cm²mol^-1. Its molarity is 0.01. Its specific conductivity will be

A
1.26 × 10^-5

B
1.26 × 10^-3

C
1.26 × 10^-4

D
0.0063

Solution
Question 8
4 / -1

Specific conductance of 0.1M Nitric acid is 6.3 × 10^-2 Ohm^-1 cm^-1. The molar conductance of the solution is

A
630 ohm^-1 cm²

B
315ohm^-1 cm²

C
100ohm^-1 cm²

D
6300 ohm^-1 cm²

Solution
Question 9
4 / -1

The ionic mobilities of the cation and the anion of a salt are 140 and 80 mhos respectively. The equivalent conductivity of the salt at infinite dilution will be

A
160 mhos

B
280 mhos

C
60 mhos

D
220 mhos

Solution
Question 10
4 / -1

The equivalent conductance of NaCl, HCl and C₂H₅COONa at infinite dilution are 126.45, 426.16 and 91 ohm^-1cm². The eq. conductance of C₂H₅COOH is

A
201.28 ohm^-1cm²

B
390.71 ohm^-1cm²

C
698.28 ohm^-1cm²

D
540.48 ohm^-1cm²

Solution