Electrochemistry, Electrochemical Cell, Galvanic Cell, Salt bridge, Electrode potential.
Electrochemistry is concerned with the relationship between chemical reactions and electrical energy, including processes such as redox or lysis. Electrolyzer cells are devices that convert chemical energy into electrical energy or vice versa by means of oxidation reactions. The electrical energy generated by spontaneous redox reactions occurring at separate electrodes connected to an external circuit is produced by galvanic cells, a type of electrolyte cell. explore Nokryan.com.
1. When a metal is dipped in 1 molar of its solution at 298k, then potential set up is called:
- electroplating
- ionization potential
- standard electrode potential
correct - Electric charge
2. The cathodic reaction in the electrolysis of dil. H₂SO₄ with Pt electrodes is:
- Reductioncorrect
- Both oxidation and reduction
- Neither oxiadation and reduction
- Oxidation
3. What is the oxidation number of chromium in ionic compound Na₂Cr₂O₇?
- 6
correct - 2
- 12
- 3
4. When electric current is used to carry out non-spontaneous redox reaction, the process is called
- hydrolysis
- Decomposition
- Electrolysiscorrect
- Neutralization
5. If a strip of Cu metal is placed in a solution of FeSO₄, then:
- Cu will be precipitated down
- No reaction takes place
- Cu and Fe both dissolve
- Fe is precipitated out
correct
6. The elctrochemical series is the arrangement of the electrodes in:
- Decreasing order of reduction potential
- Increasing order of oxidation reduction potential
- Increasing order of reduction potential
correct - There is no fixed arrangement
7. An electrochemical cell in which a spontaneous oxidation reduction reaction generates electric current is called:
- Electrolytic cell
- All above
- Galvanic or voltaic cell
correct - Dry cell
8. By means of fuel cells, chemical energy may be converted into
- Electrical energy
correct - Heat energy
- Magnetic energy
- Sound energy
9. Which is the correct statement about the following reaction? F2e+ 3CI₂ ____> 2FeCI₃
- Fe is oxidizedcorrect
- No one is correct
- CI₂ is oxidized
- Fe is reduced
10. Reduction always occurs
- At anode
- Both a and b
- At cathode
correct - None of these
11. Metals usually conduct electricity because:
- They are mobile electrons in the metallic structure
correct - Metals are decomposed by current
- In metals the ions are free to more
- Metals have high resistance
12. Electrochemical series is a list of elements arranged into the increasing order of their:
- Cell voltage
- Standard reduction potential
correct - Standard oxidation potential
- Ionization potential
13. Oxidation number of carbon in NaHCO₃ is:
- +6
- -6
- +4correct
- +2
14. The electrode through which the electrons enter the electrolytic solution is called:
- Anode
- May be cathode or anode
- Cathodecorrect
- None of all
15. The process of electrical coating of one metal on another to protect, decirate or to have a greater resistance to corrosion is called:
- Comduction
- Electrolysis
- Induction
- Electroplating
correct
16. Choose the cell among the following list in which conversion of electrical energy into chemical energy takes place:
- Daniel cellcorrect
- Galvainc cell
- Fuel cell
- Electrolytic cell
17. If the salt bridge is not used between two half cells, then the voltage
- Decrease rapidly
- Does not change
- Drops to zerocorrect
- Decrease slowly
18. Which is the oxidation state of oxygen atom in sodium superoxide?
- -2
- -1/2correct
- -1
- +1/2
19. A cell in which chemical energy is converted into electrical energy is called:
- Fuel cell
- Dry cell
- Galvanic cell
correct - Electrolytic cell
20. Stronger the oxidizing agent, greater is the
- Redox potential
- Reduction potential
correct - e.m.f of cell
- Oxidation potential
21. In electrolysis, the chemical reaction occurs at the expense of:
- None all These
- Heat energy
- Chemical energy
- Electrical energy
correct
22. Which is the oxidation number of nitrogen in the molecule N₂?
- 3
- 0correct
- 5
- 7
23. Which of the following statements is correct about Glvanic cell?
- Reduction occurs at anode
- Reduction occurs at cathodecorrect
- Anode is negatovely charged
- Cathode is positively charged
24. The galvanic or voltaic cells which cannot be recharged is called:
- Secondary cell
- Infinite cells
- Primary cell
correct - Fuel cells
25. What will be th3e density of H₂SO₄ when lead accumulator is recharged?
- 1.25 gcm ¯³
correct - 1.81gcm¯³
- 1.15 gcm¯³
- 2.15 gcm¯³
Chemistry
- Basic Concepts
- Experimental Techniques
- Gases
- Liquids and Solids
- Atomic Structure
- Chemical Bonding
- Alcohols, Phenols And Ethers
- Solutions
- Chemical Equilibrium
- Electro Chemistry
- Periodic Classification Of Elements & Periodicity
- The Halogens and Noble Gases
- Group III A And IV A Elements
- S-Block Elements
- Fundamental Principles of Organic Chemistry