Electrochemistry MCQs

1.What is the standard reduction potential value for zinc (Zn)?

0.76 V-0.76 V-0.55 V0.55 V

2.What is the oxidation state of chromium in the compound K2Cr2O7?

3.What term describes the effective charge assigned to an atom within a molecule?

bonding capacitynumber of bonded atomsoxidation statenet charge value

4.What material is used as the anode in an alkaline battery?

5.What is the typical density of sulfuric acid used in a lead-acid battery?

1.25 g/cm³1.30 g/cm³1.20 g/cm³1.15 g/cm³

6.What type of cell is referred to as a secondary cell?

7.A higher standard reduction potential indicates a greater likelihood to __________?

undergo oxidationbe reducedgain electronsboth B and C

8.In an electrochemical cell, the electrode that functions as the anode is always located at which position?

9.What determines the electrode potential of zinc?

It is always an oxidation potentialIt is solely a reduction potentialIt is both oxidation and reduction potentialIt varies based on the electrode paired with zincNone of the above

10.What is the standard potential assigned to the Standard Hydrogen Electrode (SHE)?

11.The standard electrode potential (E0) of an element is determined by measuring it against which reference?

A fresh electrode made of the same elementThe Standard Hydrogen Electrode (SHE)A 1 molar solution containing ions of the elementA 2 molar hydrochloric acid solution

12.What is transported through a salt bridge in an electrochemical cell?

13.Which electrode is present in the right half-cell?

AluminumZincCopperIron

14.What term describes the process where the oxidation state of an element is lowered?

OxidationReductionRedox reactionAll of the above refer to the same process

15.What is the name of the process that occurs at the anode during an electrochemical reaction?

16.What primarily carries electric current in an electrolytic solution?

17.How does the degree of dissociation of a weak electrolyte change with dilution?

When pressure risesWhen dilution is reducedWhen dilution is increasedIt remains unaffected

18.In a Zn-Cu electrochemical cell, which statement accurately describes the roles of the electrodes?

Electrons move from the copper electrode to the zinc electrode.The standard reduction potential of copper is lower than that of zinc.Zinc serves as the anode while copper functions as the cathode.Every statement listed here is correct.

19.Identify the type of cell from the list below that cannot be recharged.

Lead-acid storage batterySilver oxide batteryFuel cellNickel-cadmium battery