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Chapters
2: Solutions
3: Ionic Equilibria
4: Chemical Thermodynamics
▶ 5: Electrochemistry
6: Chemical Kinetics
7: Elements of Groups 16, 17 and 18
8: Transition and Inner transition Elements
9: Coordination Compounds
10: Halogen Derivatives
11: Alcohols, Phenols and Ethers
12: Aldehydes, Ketones and Carboxylic acids
13: Amines
14: Biomolecules
15: Introduction to Polymer Chemistry
16: Green Chemistry and Nanochemistry
![SCERT Maharashtra solutions for Chemistry [English] 12 Standard HSC chapter 5 - Electrochemistry - Shaalaa.com](/images/chemistry-english-12-standard-hsc_6:5f2b1b2038084cf381bfa42c826a928c.jpg "SCERT Maharashtra solutions for Chemistry [English] 12 Standard HSC chapter 5 - Electrochemistry")
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Solutions for Chapter 5: Electrochemistry
Below listed, you can find solutions for Chapter 5 of Maharashtra State Board SCERT Maharashtra for Chemistry [English] 12 Standard HSC.
SCERT Maharashtra solutions for Chemistry [English] 12 Standard HSC 5 Electrochemistry Multiple choice questions
1 Mark
Kohlrausch law is applicable for the solution _______.
At infinite dilution
a concentrated solution
concentrated as well as dilute solution
aqueous solution
During electrolysis of molten NaCl, which of the following statements is correct?
a pale green Cl2 gas is released at anode
molten silvery white sodium is deposited at cathode
decomposition of NaCl into Na metal and Cl2 gas
all the above
SI unit of conductivity is _______.
Ω-1 m-1
Ω cm-1
Ω m-1
Ω-1 m2 mol-1
In case of weak electrolyte the graph Λ vs `sqrt"c"` is _______.
linear
not linear
straight line passing from origin
curved
In construction of Standard Hydrogen Electrode, platinum acts as ______.
inert electrode
positive ion producing electrode
negative ion producing electrode
null electrode
For hydrogen gas electrode, `"E"_("H"_2)` is calculated through to Nernst equation, where `"E"_("H"_2)^0` is always _______.
1.1 V
0 V
–1.1 V
0.0592 V
When molten ionic compound is electrolyzed, a metal is formed at _______.
negative electrode
positive electrode
salt bridge
electrolyte
The molar conductivity and conductivity of AgNO3 solution is 121.4 Ω–1 cm2 mol–1 and 2.428 × 10–3 Ω–1 cm–1 at 25 °C. What is molar concentration of AgNO3 solution?
0.2 M
0.02 M
2.0 M
2.2 M
A cell constituted by two electrodes A (`"E"_("A"^+//"A")^0` = 0.35 V) and B (`"E"_("B"^+//"B")^0` = + 0.42 V) has value of `"E"_"cell"^0` equal to _________.
0.77 V
0.07 V
–0.77 V
–0.07 V
Calculate `"E"_"cell"^0` for galvanic cell with electrodes Co/Co3+// Mn2+/Mn.
`"E"_"Mn"^0` = - 1.18 V, `"E"_"Co"^0` = 1.82 V.
–3.0 V
+3.0 V
1.36 V
0.268 V
SCERT Maharashtra solutions for Chemistry [English] 12 Standard HSC 5 Electrochemistry Very short answer questions
1 Mark
Give SI unit of resistivity.
What is cell voltage?
Write a mathematical expression for Standard Cell Potential.
Name the process by which water produces hydrogen gas at cathode during electrolysis of aqueous NaCl.
Give the chemical composition present in the salt bridge.
Write the potential produced through the NICAD storage cell.
Write an equation that shows the relationship between molar conductivity and degree of dissociation of weak electrolyte.
SCERT Maharashtra solutions for Chemistry [English] 12 Standard HSC 5 Electrochemistry Short answer questions (Type- I)
2 Marks
Draw a neat and labelled diagram for electrolysis of fused NaCl.
What are the functions of a salt bridge in a galvanic cell?
Derive the relationship between standard cell potential and equilibrium constant of cell reaction.
Write applications of Kohlrausch’s Law.
What is cell constant? Write its SI unit.
Mention difficulties in settings Standard Hydrogen Electrode.
What is the mass of copper metal produced at cathode during the passage of 2.03 A current through the CuSO4 solution for 1 hour. Molar mass of Cu = 63.5 g mol–1.
Mercury battery provides more constant voltage than any other dry cell: Explain.
Represent the galvanic cell from following overall cell reaction:
3Ni(s) + 2Al3+ (1 M) → 3Ni2+(1 M) + 2Al(s)
How many moles of electrons are required for reduction of 2 moles of Zn2+ to Zn?
Calculate standard cell potential of following galvanic cell:
Zn/Zn2+(1 M) // Pb2+(1 M)/Pb. If `"E"_"Pb"^0` = 0.126 V and `"E"_"Zn"^0` = –0.763 V
SCERT Maharashtra solutions for Chemistry [English] 12 Standard HSC 5 Electrochemistry Short answer questions (Type- II)
3 Marks
State Kohlrausch law of independent migration of ions.
Derive the relationship between Gibbs energy of cell reaction and cell potential.
Give the main difference between electrolytic conductivity and molar conductivity with respect to concentration.
Write two applications of electrochemical series.
Write three important steps required to determine molar conductivity.
Draw a neat and well labelled diagram of Standard Hydrogen Electrode. Also write its one application.
Define Reference electrode
Write two applications of electrochemical series.
Calculate the voltage of the cell Sn(s) / Sn2+(0.02 M) // Ag+ (0.01 M) / Ag(s) at 25 °C.
Given: `"E"_"Sn"^circ` = - 0.136, `"E"_"Ag"^circ` = 0.800 V
Draw a well labelled diagram of a conductivity cell. Also write net cell reactions involved in electrolysis of aqueous NaCl.
Write a mathematical formula for mole ratio. How long will it take to produce 2.415g of Ag metal from its salt solution by passing a current of 3A? Molar mass of Ag= 107.9 g mol-1.
SCERT Maharashtra solutions for Chemistry [English] 12 Standard HSC 5 Electrochemistry Long answer questions
4 Marks
Why is Nickel-cadmium cell referred to as a secondary cell?
Write working of NICAD storage cell. Also write its applications.
Write relation between electrolytic conductivity and molar conductivity.
Calculate molar conductivities at zero concentration for CaCl2 and NaCl.
Given: molar ionic conductivities of Ca2+, Cl–, Na+ ions are respectively, 104, 76.4, 50.1 Ω–1 cm–2 mol–1
Calculate `"E"_"cell"^circ` of the following galvanic cell:
Mg(s) / Mg2+(1 M) // Ag+ (1 M) / Ag(s) if `"E"_"Mg"^circ` = – 2.37 V and `"E"_"Ag"^circ` = 0.8 V. Write cell reactions involved in the above cell. Also mention if cell reaction is spontaneous or not.
Explain construction, working in terms of cell reactions and the results of electrolysis of fused NaCl.
Solutions for 5: Electrochemistry
SCERT Maharashtra solutions for Chemistry [English] 12 Standard HSC chapter 5 - Electrochemistry
Shaalaa.com has the Maharashtra State Board Mathematics Chemistry [English] 12 Standard HSC Maharashtra State Board solutions in a manner that help students grasp basic concepts better and faster. The detailed, step-by-step solutions will help you understand the concepts better and clarify any confusion. SCERT Maharashtra solutions for Mathematics Chemistry [English] 12 Standard HSC Maharashtra State Board 5 (Electrochemistry) include all questions with answers and detailed explanations. This will clear students' doubts about questions and improve their application skills while preparing for board exams.
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Concepts covered in Chemistry [English] 12 Standard HSC chapter 5 Electrochemistry are Electrochemistry, Electric Conduction, Electrical Conductance of Solution, Electrochemical Cells, Electrolytic Cell, Galvanic or Voltaic Cell, Electrode Potential and Cell Potential, Thermodynamics of Galvanic Cells, Reference Electrodes, Galvanic Cells Useful in Day-to-day Life, Fuel Cells, Electrochemical Series (Electromotive Series).
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