Electrochemistry Test Online Mcqs Preparation

Electrochemistry Test Online Mcqs Preparation With Answers Start Below

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Question 1 of 15

1. Coinage metals have least reactivity because they have:

A. Zero oxidation potentials

B. Positive reduction potentials

C. Zero reduction potentials

D. Positive oxidation potentials

Question 1 of 15

Question 2 of 15

2. Four metals A, B, C and D are having standard electrode potential as -3.05, -1.66, -0.4 and 0.8V respectively. Which one will be the best reducing agent:

A. B

B. A

C. D

D. C

Question 2 of 15

Question 3 of 15

3. The ability of elements to act as reducing agent _________ down to electrochemical series

A. Decreases

B. Depends upon the reaction conditions

C. Remain constant

D. Increases

Question 3 of 15

Question 4 of 15

4. Which one metal shows maximum oxidation state?

A. Cr

B. Hg

C. Mn

D. Ag

Question 4 of 15

Question 5 of 15

5. SHE acts as anode when connected with Cu electrode but cathode with Zn electrode because

A. Zn has less reduction potential than hydrogen and Cu more

B. Zn is above in electrochemical series than hydrogen and Cu below

C. Zn has less oxidizing potential than hydrogen and Cu more

D. All the above are possible reasons

Question 5 of 15

Question 6 of 15

6. “Al” metal is extracted from its ________ during electrolysis

A. Cryolite

B. Chlorides

C. Oxides

D. All of these

Question 6 of 15

Question 7 of 15

7. The electrolysis product of molten NaCl at electrodes

A. Na and Cl2

B. H2 and Cl2

C. H2, Cl2, and NaOH

D. Na and NaOH

Question 7 of 15

Question 8 of 15

8. The oxidation potential of Mg and Al are +2.37 and 1.66V, respectively. The Mg is chemical reaction:

A. None of the above

B. Will replace Al

C. Wont be able to replace Al

D. Will be replaced by Al

Question 8 of 15

Question 9 of 15

9. Electrochemical series is useful in:

A. Comparison of the relative tendencies of the metals and non-metals to get oxidized or reduced

B. Calculation of voltage

C. Prediction of the feasibility of a chemical reaction

D. All of the above

Question 9 of 15

Question 10 of 15

10. The correct order of equivalent conductance at infinite dilution among LiCl, NaCl and KCl is:

A. LiCl > KCl > NaCl

B. LiCl > NaCl > KCl

C. KCl > NaCl > LiCl

D. NaCl > KCl > LiCl

Question 10 of 15

Question 11 of 15

11. Greater the value of the standard reduction potential of the given species:

A. Greater is its tendency to lose electrons to undergo reduction

B. Greater is its tendency to accept electrons to undergo reduction

C. Greater is its tendency to lose electrons to undergo oxidation

D. Greater is its tendency to accept electrons to undergo oxidation

Question 11 of 15

Question 12 of 15

12. In a galvanic ell, the electrode occupying a lower position in the electrochemical series:

A. Oxidation will take place on it

B. Both a and b

C. Will act as cathode

D. Reduction will take place on it

Question 12 of 15

Question 13 of 15

13. If a strip of Cu-metals is placed in a solution of FeSO₄ then

A. Cu and Fe both dissolve

B. Fe is precipitated

C. Cu will be deposited

D. No reaction occur

Question 13 of 15

Question 14 of 15

14. Which can be replace hydrogen from dilute acids?

A. Au

B. None of these

C. Zn

D. Pt

Question 14 of 15

Question 15 of 15

15. During the electrolysis of aqueous KNO₃, H₂ is produced at cathode instead of potassium due to

A. Reduction potential of potassium is less than hydrogen

B. Hydrogen is more reactive than potassium

C. Reduction potential of K is greater than hydrogen

D. All of the above are possible reasons

Question 15 of 15

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Electrochemistry Test Online Mcqs Preparation

Electrochemistry Test Online Mcqs Preparation With Answers Start Below

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