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Chemistry Class 12
Solutions to CBSE Sample Paper - Chemistry Class 12

a. Molar conductivity of substance “A” is 5.9×10 3 S/m and “B” is 1 x 10 -16 S/m. Which of the two is most likely to be copper metal and why?

b. What is the quantity of electricity in Coulombs required to produce 4.8 g of Mg from molten MgCl 2 ? How much Ca will be produced if the same amount of electricity was passed through molten CaCl 2 ? (Atomic mass of Mg = 24 u, atomic mass of Ca = 40 u).

c. What is the standard free energy change for the following reaction at room temperature? Is the reaction spontaneous?

Sn(s) + 2Cu 2+ (aq) à Sn 2+ (aq) + 2Cu + (s)



Question 33 Choice B - Molar conductivity of substance - teachoo.jpg

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.