﻿ Two Faraday of electricity is passed through a solution of CuSO4

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## Electrochemistry

#### Multiple Choice Questions

1.

Which among the following metals is employed to provide cathodic protection to iron?

• Zinc

• Nickel

• Tin

2.

Galvanization is applying a coating of:

• Cr

• Cu

• Zn

• Zn

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# 3.Two Faraday of electricity is passed through a solution of CuSO4. The mass of copper deposited at the cathode is: (at. mass of Cu = 63.5 amu) 0 g 63.5 g 2 g 2 g

B.

63.5 g

Atomic mass of Cu = 63.5 u
Valency of the metal Z= 2
We have,
CuSO4 → Cu2+ + SO42-
Cu2+ + 2e-  →  Cu

1 mol   2 mol       1 mol = 63.5 g
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4.

The equivalent conductance of NaCl at concentration C at infinite dilution are λC and λ respectively. The correct relationship between λC and λ  is given as (where the constant B is positive)

• λC = λ +(B)C

• λC = λ -(B)C

• λC = λ -(B)

• λC = λ -(B)

343 Views

5.

Given below are the half-cell reactions
Mn2+ + 2e- → Mn; Eo = - 1.18 eV
2(Mn3+ + e- →Mn2+); Eo = +1.51 eV
The Eo for 3Mn2+ → Mn + 2Mn3+ will be

• -2.69 V; the reaction will not occur

• -2.69 V; the reaction will occure

• -0.33 V; the reaction will not occur

• -0.33 V; the reaction will not occur

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6.

Given,

Based on the data given above, strongest oxidising agent will be

• Cl

• Cr3+

• Mn2+

• Mn2+

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7.

Four successive members of the first-row transition elements are listed below with atomic numbers. Which one of them is expected to have the highest   value?

• Cr (Z =24)

• Mn(Z =25)

• Fe (Z = 26)

• Fe (Z = 26)

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8.

How many litres of water must be added to 1 L to an aqueous solution of HCl with a pH of 1 create an aqueous solution with PH of 2?

• 0.1 L

• 0.9 L

• 2.0 L

• 2.0 L

201 Views

9.

The reduction potential of hydrogen half-cell will be negative if

• p(H2) = 1 atm and [H+] = 2.0 M

• p(H2) = 1 atm and [H+] = 1.0 M

• p(H2) = 2 atm and [H+] = 1.0 M

• p(H2) = 2 atm and [H+] = 1.0 M

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10.

The degree of dissociation (α) of a weak electrolyte ,AxBy is related to van't Hoff factor (i) by the expression

665 Views