12thChemistry Important 1 Marks Electro Chemistry

One Mark Study Material Unit wise as per reduced syllabus (2021-22)

TN 12thChemistry Important 1 Marks Electro Chemistry. 12th Chemistry Important Questions Chapter 9. +2 Chemistry Important 2 Marks,  3 Marks, 5 Marks Questions Based on reduced Syllabus 2021-2022. 12th Free Online Test (MCQs). HSC 12th Chemistry Revision Test Important Questions. 12th Tamil Full Guide.

HSC 12th Chemistry Important One Marks Chapter 9

Electro Chemistry :

• 1. Electrolytic cell is it converts electrical energy into chemical energy.
• 2. Faraday’s first law of electrolysis formula is m 𝜶 Q
• 3. Faraday’s Second law of electrolysis mAg/ZAg = mZn/ZZn = mcu/ZCu
• 4. (1/𝜌) is called as Specific conductance
• 5. The ratio (l/A) is called as Cell constant
• 6. The no.of. electrons that have a total charge of 9650 coulomb is 6.022 x 10²²
• 7. The molar conductivity of a 0.5 mol dm^-3 solution of AgNO³ with electrolytic conductivity of 5.76 x 10^-3S cm^-1 at 298K is 11.52 S cm² mol^-1
• 8. Faradays constant defined as Charge carried by one mole of electrons
• 9. How many faradays of electricity are required for the following reaction to occur MnO₄ →Mn²⁺ is 5F
• 10. During electrolysis of molten sodium chloride, the time required to produce 0.1 mole
  of chlorine gas using a cu7rrent of 3A is 107.32 minutes.
• 11. The no.of. electrons delivered at the cathode during electrolysis by a current of 1A in 60 seconds is 3.75 x 10²⁰
• 12. 0.002N electrolytic solution has the least specific conductance.
• 13. Zinc can be coated on iron to produce galvanized iron but the reverse is not possible. It is because Zinc has higher negative electrode potential than iron.
• 14. A gas X at 1 atm is bubble through a solution containing a mixture of 1MY^– & MZ^– at 25⁰c if the reduction potential is Z > Y > X, then Y will oxidize X and not Z
• 15. A certain current liberated 0.504 gm of hydrogen in 2 hours. How many grams of copper can be liberated by the same current flowing for the same time in a copper sulphate solution is 15.8
• 16. The equivalent conductance of M/36 solution of a weak monobasic acid is 6 mho cm2 equivalent-1 and at infinite dilution is 400 mho cm2 equivalent-1. The dissociation constant of the acid is 6.25 x 10^-6
• 17. Conductivity of a saturated solution of a sparingly soluble salt AB(1:1 electrolyte) at 298K is 1.85 x 10^-5S m^-1. Solubility product of the salt AB at 1.74 x 10^-12
• 18. While charging lead storage battery is PbSO₄ on anode is reduced to Pb
• 19. Degree of dissociation formula is ꓥ^o/ ꓥ^o∞
• 20.A small piece of Zinc dissolved in dilute nitric acid but hydrogen gas is not evolved (Assertion) HNO₃ is an oxidizing agent and this oxidizes hydrogen (Reason) Ans.Both assertion and reason are true and reason is the correct explanation of assertion.
• 21. A solution of silver nitrate is electrolyzed for 30 minutes with a current of 2 amperes. Calculate the mass of silver deposited at the cathode. 4.03g
• 22. Arrange the following solutions in the decreasing order of specific conductance. 0.01M KCl,0.005M Kcl, 0.1 m Kcl, 0.25 M Kcl & 0.5 M Kcl. Ans. Correct order is 0.5M Kcl > 0.25 MKcl > 0.1 MKcl > o.o1 M Kcl > 0.005M Kcl.
• 23. Debye – Huckel onsager equation is ꓥm = ꓥm^o – ( A + Bꓥm^o)√C
• 24. Nernst equation is Ecell = E^ocell – 2.303RT/nF log [C]^l [D]^m/ [A]^x [B]^y
• 25. Equivalent conductance is represented by the symbol is ꓥ
• 26. Molar conductance is represented by the symbol is ꓥm
• 27. The Galvanic cell is represented by a cell diagaram,it is represented by Zn(s)|Zn²⁺ ||
  Cu²⁺ (aq) Cu(s)
• 28. Daniel cell represented by Zn(s)| Zn²⁺ || Cu²⁺(aq)|Cu(s)
• 29. Galvanic cell notation is represented by Cr(s)| Cr³⁺(aq) || Cu²⁺(aq)|Cu(s)
• 30. The standard reduction potential (Eo) is a measure of the Oxidizing tendency of the species.
• 31. Greater Eo value greater is the tendency shown by the species to accept electrons & undergo Reduction.
• 32. If the E^o value is lesser is the tendency to undergo Corrosion.
• 33. Specific conductance of an electrolyte can be calculated from the resistance value using the following expression is k = 1/R (l/A)
• 34. Kohlrausch deduced the following empirical relationship between the molar conductance and the concentration of electrolyte is ꓥ_m = ꓥ^–_m – k√C
• 35. Kcl, Na₂SO₄ it acts as agar-agar gel mixed with inert electrolyte.