ELECTROCHEMISTRY

9
Created on By buzzerkings

ELECTROCHEMISTRY

1 / 45

Consider the metals: Mn, Mg, Zn, Ag, Cu. Based their reactivity order, pick the correct statement.

2 / 45

During the process of electrolytic refining of copper, some metals present as impurity settle as "anode mud". These are

3 / 45

Several blocks of magnesium are fixed to the bottom of a ship to:

4 / 45

Standard reduction electrode potentials of three metals. A, B and C are respectively +0.5V, -3.0V and -1.2 V. The reducing powers of these metals are: 

5 / 45

The standard reduct potentials for Zn2+/Zn , Ni2+/Ni , and Fe2+/Fe are -0.76 V, -0.23 V and -0.44V, respectively. The reaction X + Y2+ → X2+ +  Y will be spontaneous when reaction 

X + Y2+ → X2+ +  Y will be spontaneous when: 

6 / 45

In the electrolytic cell, flow of electrons is from:

7 / 45

The highest electrical conductivity among the following aqueous solutions is of:

8 / 45

A standard hydrogen electrode has zero electrode potential because:

9 / 45

Which of the following agents is the most reducing?

10 / 45

The reaction 3CLO (aq) → ClO3-(aq) + 2Cl(aq) is an example of:

11 / 45

Which of the following is not a reducing agent?

12 / 45

The oxidation number of carbon in CH2Cl2 is:

13 / 45

Fe+3 is reduced to Fe+2 by using:

14 / 45

Among the following, identify the correct statement.

15 / 45

Hydrogen gas is not liberated when following metal added to dilute solution of HCl:

16 / 45

In galvanic cell, a salt bridge is used in order to: 

17 / 45

Which species is the oxidizing agent in the following reaction?

Cl₂(aq) + 2I(aq) → I2(aq) + 2Cl(aq)

 

18 / 45

Strongest oxidizing agent in the electrochemical series is:

19 / 45

Metals which are above SHE in electrochemical series:

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The electrode with more negative value of reduction potential acts as:

21 / 45

The species which can act as oxidizing as well as reducing agent: 

22 / 45

Which of the following conduct electricity due to the migration of electrons only?

23 / 45

The e.m.f. produced by a voltage cell is:

24 / 45

Which one of the following will be good conductor of electricity:

25 / 45

When fused PbBr₂ is electrolysed:

26 / 45

In the reaction 2Fe + 3Cl2 → 2FeCl3

27 / 45

In a hydrogen-oxygen fuel cell, combustion hydrogen occurs to: 

28 / 45

Which of the following chemical reactions depicts the oxidizing behavior of H₂SO4?

29 / 45

For the reactions

C+O₂ → CO2 ; H = -393 kJ

2Zn+O2 → 2ZnO ; H = -412 kJ 

30 / 45

Which metal can be used as a sacrificial electrode to prevent the rusting of an iron pipe? 

31 / 45

The metallic conductors in contact with the solution are called:

32 / 45

An apparatus in which chemical energy in converted to electrical energy is called:

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The process in which ionic compound when fused or dissolved in water split up into charged particles is called:

34 / 45

A substance which in molten state or form allows electric current to pass through it is in solution called:

35 / 45

Which element acts as a reducing agent in the Reaction?

Zn+H₂SO4 → ZnSO4 + H2 

36 / 45

Which of the following is the definition of oxidation?

37 / 45

The metal which will act as anode when connected to copper: 

38 / 45

Electrode potential depends on:

39 / 45

During electrolysis of dilute aqueous solution of KNO3, which specie is evolved at anode?

40 / 45

Aluminium is prepared by electrolysis of bauxite having formula:

41 / 45

In all oxidation reaction, atoms of an element lose electrons and increase their: 

42 / 45

In which of the following does sulfur have an oxidation number of +7?

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In which substance does bromine have an oxidation number of +1?

44 / 45

What happens to the oxidizing agent in an oxidation-reduction reaction?

45 / 45

Which of these chemical reactions is an oxidation-reduction reaction?

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