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Class 12 Exam  >  Class 12 Questions  >   Passage IIIn hydrogen eco... Start Learning for Free
                                        Passage II
In hydrogen economy fuel-cell,anodic and cathodic reactions are 
Anodic
H2+2OH- → 2H2O + 2e-
Cathodic
O2+2H2O + 2e- → 4OH-
67.2 L H2 at STP react in 15 min.Entire current is used for electro deposition of copper from copper(II) sulphate solution. Average current produced in fuel cell is   
  • a)
    610.00 A
  • b)
    620.00 A
  • c)
    617.8 A
  • d)
    643.3 A
Correct answer is option 'D'. Can you explain this answer?
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Passage IIIn hydrogen economy fuel-cell,anodic and...
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Passage IIIn hydrogen economy fuel-cell,anodic and...
Calculation of Average Current:
- Given data:
Volume of H2 = 67.2 L
Time taken = 15 min

Step 1: Calculate the number of moles of H2:
1 mol of any gas at STP occupies 22.4 L
Number of moles of H2 = 67.2/22.4 = 3 moles

Step 2: Calculate the number of electrons:
From the balanced equation, 1 mol of H2 produces 2 moles of electrons
Therefore, 3 moles of H2 will produce 6 moles of electrons

Step 3: Calculate the charge:
1 mole of electrons = 1 Faraday = 96500 C
Therefore, 6 moles of electrons will carry a charge of 6 * 96500 = 579000 C

Step 4: Calculate the current:
Given time = 15 min = 900 s
Current (I) = Charge (Q) / Time (t)
I = 579000 C / 900 s = 643.3 A
Therefore, the average current produced in the fuel cell is 643.3 A.

Conclusion:
The correct answer is option 'D' - 643.3 A, obtained by calculating the charge produced by the reaction of H2 at the anode and the time taken for the reaction.
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Read the passage given below and answer the following questions:Reductive alkylation is the term applied to the process of introducing alkyl groups into ammonia or a primary or secondary amine by means of an aldehyde or ketone in the presence of a reducing agent. The present discussion is limited to those reductive alkylations in which the reducing agent is hydrogen and a catalyst or "nascent" hydrogen, usually from a metalacid combination; most of these reductive alkylations have been carried out with hydrogen and a catalyst. The principal variation excluded is that in which the reducing agent is formic acid or one of its derivatives; this modification is known as the Leuckart reaction. The process of reductive alkylation of ammonia consists in the addition of ammonia to a carbonyl compound and reduction of the addition compound or its dehydration product. The reaction usually is carried out in ethanol solution when the reduction is to be effected catalytically:Since the primary amine is formed in the presence of the aldehyde it may react in the same way as ammonia, yielding an additional compound, a Schiff's base (RCH= NCH2R) and finally, a secondary amine. Similarly, the primary amine may react with the imine, forming an addition product which also is reduced to a secondary amine Finally, the secondary amine may react with either the aldehyde or the imine to give products which are reduced to tertiary amines.Similar reactions may occur when the carbonyl compound employed is a ketone.Q. The reaction of ammonia and its derivatives with aldehydes is called

Passage IIIn hydrogen economy fuel-cell,anodic and cathodic reactions areAnodicH2+2OH-→ 2H2O + 2e-CathodicO2+2H2O + 2e-→ 4OH-67.2 L H2 at STP react in 15 min.Entire current is used for electro deposition of copper from copper(II) sulphate solution. Average current produced in fuel cell is a)610.00 Ab)620.00 Ac)617.8 Ad)643.3 ACorrect answer is option 'D'. Can you explain this answer?
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Passage IIIn hydrogen economy fuel-cell,anodic and cathodic reactions areAnodicH2+2OH-→ 2H2O + 2e-CathodicO2+2H2O + 2e-→ 4OH-67.2 L H2 at STP react in 15 min.Entire current is used for electro deposition of copper from copper(II) sulphate solution. Average current produced in fuel cell is a)610.00 Ab)620.00 Ac)617.8 Ad)643.3 ACorrect answer is option 'D'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Passage IIIn hydrogen economy fuel-cell,anodic and cathodic reactions areAnodicH2+2OH-→ 2H2O + 2e-CathodicO2+2H2O + 2e-→ 4OH-67.2 L H2 at STP react in 15 min.Entire current is used for electro deposition of copper from copper(II) sulphate solution. Average current produced in fuel cell is a)610.00 Ab)620.00 Ac)617.8 Ad)643.3 ACorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Passage IIIn hydrogen economy fuel-cell,anodic and cathodic reactions areAnodicH2+2OH-→ 2H2O + 2e-CathodicO2+2H2O + 2e-→ 4OH-67.2 L H2 at STP react in 15 min.Entire current is used for electro deposition of copper from copper(II) sulphate solution. Average current produced in fuel cell is a)610.00 Ab)620.00 Ac)617.8 Ad)643.3 ACorrect answer is option 'D'. Can you explain this answer?.
Solutions for Passage IIIn hydrogen economy fuel-cell,anodic and cathodic reactions areAnodicH2+2OH-→ 2H2O + 2e-CathodicO2+2H2O + 2e-→ 4OH-67.2 L H2 at STP react in 15 min.Entire current is used for electro deposition of copper from copper(II) sulphate solution. Average current produced in fuel cell is a)610.00 Ab)620.00 Ac)617.8 Ad)643.3 ACorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12. Download more important topics, notes, lectures and mock test series for Class 12 Exam by signing up for free.
Here you can find the meaning of Passage IIIn hydrogen economy fuel-cell,anodic and cathodic reactions areAnodicH2+2OH-→ 2H2O + 2e-CathodicO2+2H2O + 2e-→ 4OH-67.2 L H2 at STP react in 15 min.Entire current is used for electro deposition of copper from copper(II) sulphate solution. Average current produced in fuel cell is a)610.00 Ab)620.00 Ac)617.8 Ad)643.3 ACorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Passage IIIn hydrogen economy fuel-cell,anodic and cathodic reactions areAnodicH2+2OH-→ 2H2O + 2e-CathodicO2+2H2O + 2e-→ 4OH-67.2 L H2 at STP react in 15 min.Entire current is used for electro deposition of copper from copper(II) sulphate solution. Average current produced in fuel cell is a)610.00 Ab)620.00 Ac)617.8 Ad)643.3 ACorrect answer is option 'D'. Can you explain this answer?, a detailed solution for Passage IIIn hydrogen economy fuel-cell,anodic and cathodic reactions areAnodicH2+2OH-→ 2H2O + 2e-CathodicO2+2H2O + 2e-→ 4OH-67.2 L H2 at STP react in 15 min.Entire current is used for electro deposition of copper from copper(II) sulphate solution. Average current produced in fuel cell is a)610.00 Ab)620.00 Ac)617.8 Ad)643.3 ACorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of Passage IIIn hydrogen economy fuel-cell,anodic and cathodic reactions areAnodicH2+2OH-→ 2H2O + 2e-CathodicO2+2H2O + 2e-→ 4OH-67.2 L H2 at STP react in 15 min.Entire current is used for electro deposition of copper from copper(II) sulphate solution. Average current produced in fuel cell is a)610.00 Ab)620.00 Ac)617.8 Ad)643.3 ACorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Passage IIIn hydrogen economy fuel-cell,anodic and cathodic reactions areAnodicH2+2OH-→ 2H2O + 2e-CathodicO2+2H2O + 2e-→ 4OH-67.2 L H2 at STP react in 15 min.Entire current is used for electro deposition of copper from copper(II) sulphate solution. Average current produced in fuel cell is a)610.00 Ab)620.00 Ac)617.8 Ad)643.3 ACorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Class 12 tests.
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