Class 12 Chemistry Important Questions | Chapter 5 Electrochemistry

Here we have a given Class 12 Chemistry Important Questions for Maharashtra Board HSC Examination 2024. Every students want to score good marks in Class 12 Board Exam,but number of students don't know how to score good marks. Dear students, following given questions had been asked in earlier HSC Board Examinations. From this post, you will know which type of questions had been asked in earlier Board Exams and same questions or same type of questions will be asked in your upcoming examination. If you study all these questions, you will get very good marks in your board examinations, Because so many questions from the following given questions will be asked in your upcoming examination.Therefore go through our Class 12 Chemistry Important Questions which are given in chapter-wise manner and simply try to solve these questions to score very good marks in Chemistry and obviously, you will! Best wishes to all dear students for your upcoming Maharashtra State Board Exam 2024.


यहां हमारे पास महाराष्ट्र बोर्ड HSC परीक्षा 2024 के लिए कक्षा 12वीं के Chemistry के महत्वपूर्ण प्रश्न दिए गए हैं। प्रत्येक छात्र कक्षा 12वीं की बोर्ड परीक्षा में अच्छे अंक प्राप्त करना चाहते हैं, लेकिन कई छात्र यह नहीं जानते कि अच्छे अंक कैसे प्राप्त करें। प्रिय छात्रों, नीचे दिए गए प्रश्न पिछले एचएससी बोर्ड परीक्षाओं में पूछे गए थे। इस पोस्ट से आप जानेंगे कि पिछली बोर्ड परीक्षाओं में किस प्रकार के प्रश्न पूछे गए थे और आपकी आगामी परीक्षा में भी इसी प्रकार के प्रश्न पूछे जाएंगे। यदि आप इन सभी प्रश्नों का अध्ययन करते हैं, तो आप अपनी बोर्ड परीक्षाओं में बहुत अच्छे अंक प्राप्त करेंगे, क्योंकि निम्नलिखित दिए गए प्रश्नों में से बहुत सारे प्रश्न आपकी आगामी परीक्षा में पूछे जाएंगे। इसलिए हमारे कक्षा 12 के Chemistry के महत्वपूर्ण प्रश्नों को देखें जो अध्याय में दिए गए हैं | Chemistry में बहुत अच्छे अंक प्राप्त करने के लिए इन प्रश्नों को बुद्धिमान तरीके से हल करने का प्रयास करें और जाहिर है, आप करेंगे! सभी प्रिय छात्रों को आपकी आगामी महाराष्ट्र राज्य बोर्ड परीक्षा 2024 के लिए शुभकामनाएं।

 


Class 12 Chemistry Important Questions | Chapter 5 Electrochemistry 

• State and explain Faraday's second law of electrolysis. (March 2008)

• Define 'Faraday'. (March 2008, March 2011)

• Describe the construction and working of standard hydrogen electrode. Give its two disadvantages. (March 2008, Oct. 2008)

• Describe the construction and working of H2 - O2 fuel cell. Write its advantages. (March 2009)

• Write Nernst equation for single electrode potential and give the meaning of the terms involved in it. (March 2010)

• What is electrochemical series? Explain its applications in the determination of relative strength of oxidizing and reducing agents. (March 2010, Oct. 2010)

• Describe electrochemical theory of corrosion. Why is the prevention of corrosion needed ? (March 2010)

• Define 'Corrosion'. (Oct. 2010, March 2011)

• What is corrosion. Explain the need for prevention of corrosion. (March 2011)

• Explain the construction and working of lead accumulator. (March 2011)

• State Kohlrausch Law and write mathematical expression of molar conductivity of the given solution at infinite dilution. (March 2013)
 
• Write the cell reactions in lead storage battery during discharge. (March 2013)

• In electrolysis of AgNO3 solution, 0.7 g of Ag is deposited after a certain period of time. Calculate the quantity of electricity required in coloumb. (Molar mass of Ag is 107.9 g/mol) (March 2013)

• State and explain Faraday's first and second law of electrolysis. (Oct. 2013)

• Write electrode reaction and net cell reaction for fuel cell. Calculate emf of following cell at 25. 
Standard reduction potential (SRP) of Zn and Cu are -0.76 V and 0.334 V respectively. (Oct. 2013)

• Resistance and conductivity of a cell containing 0.001 M KCI solution at 298K are 1500 Ω and 1.46 x 10-4 S/cm respectively. What is the cell constant? (March 2014)

• State the first and second law of electrolysis. (March 2014)

• Draw neat labelled diagram of calomel electrode. (March 2014)

• Write any four applications of electrochemical series. (Oct. 2014)

• With the help of the equation, ΔG = - nFEcell explain that cell potential is an intensive property. (Oct. 2014)

• How much electricity in terms of Faraday is required to produce:
(a) 20 g of Ca from molten CaCl2
(b) 40 g of Al from molten Al2O3
(Given: Molar mass of Calcium and Aluminium are 40g/mol and 27g/mol respectively.) (Oct. 2014)


• Draw neat and labelled diagram of dry cell. (March 2015)

• Arrange the following reducing agents in the order of increasing strength under standard state conditions. Justify the answer.
a) Al(s),    E° = -1.66 V
b) Cu(s),   E° = 0.34 V
c) Cl-(aq), E° = 1.36 V
d) Ni(s),    E° = - 0.26 V (March 2015)

• Calculate Ecell and ΔG for the following at 28°C:
Mg(s) + Sn2+ (0.04M) -------> Mg2+ (0.06M) + Sn(s)
Ecell = 2.23 V. Is the reaction spontaneous? (March 2015)

• Define cell constant. Draw a neat and well labelled diagram of primary reference electrode. (March 2016)

• Define molar conductivity. (March 2016)

• Conductivity of a solution is 6.23 x 10-5/Ωcm and its resistance is 13710 Ω. If the electrodes are 0.7 cm apart, calculate the cross-sectional area of electrode. (March 2016)

• What are fuel cells. Write cathode and anode reaction in a fuel cell. (March 2017)

•  0.05 M NaOH solution offered a resistance of 31.6Ω in a conductivity cell at 298 K. If the cell constant of the cell is 0.367 cm-1, calculate the molar conductivity of NaOH solution. (March 2017)

• State Faraday's first law of electrolysis. (March 2017)

• Draw a neat and labelled diagram of lead storage battery. (March 2018)

• Define reference electrode. (March 2018)

• How many Faradays of electricity are required to produce 13 g of aluminium from aluminium chloride solution? (Molar mass of Al = 27 g/mol) (March 2018)

• How many Faradays of electricity are required to produce 6 g of Mg from MgCl2? (March 2019)

• How many coulombs of electricity are required to produce 4.5 g of aluminium from molten aluminium chloride (molar mass of Al is 27 g/mol). (March 2019)

• The molar conductivity of 0.05 M BaCl2 solution at 25°C is 223Ω-1cm2/mol. What is its conductivity? (March 2019)

• Define electrochemical series. Write its applications. (March 2019, March 2020)

• Write the cell reaction and calculate E° cell the following electrochemical cell :
Al(s) | Al3+(aq.) || Zn2+(aq.) | Zn(s)
E°(Al)  = -1.66V
E°(Zn) = -0.76V (March 2020)

• Define the terms :
(a) Electrochemical series
(b) Corrosion
Write two applications of electrochemical series.
(March 2020)

• The standard emf of the following cell is 0.463 V
Cu(s) | Cu2+(1M)  | | Ag+(1M) | Ag(s)
If the standard potential is 0.800 V, what is the standard potential of Cu electrode? (March 2020)


👉 Students are suggested to go through our Class 12 Chemistry Important Questions to score more in your upcoming 2024 Board Examination. 👇👇

Class 12 Chemistry Important Questions Chapter-wise

 Click on the following links to get Class 12 Chemistry Important Questions.👇👇 

• Chapter 2 - Solutions

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