Chemistry : Part I for Class XII
Electrochemistry - 02

Instructions

1. All questions are compulsary.
2. Please give the explanation for the answer where applicable.
3. To view the answer, click on the Answer link alongside the Question.
You can view the answer when the link becomesGreen Red. on completion of allocated time.


Q.1) The resistance of 0.5 M CH3COOH solution is 100 ohm. The cell constant is 0.035 cm–1.Calculate molar conductivity of solution.  (3 Marks) 

Q.2) How many grams of oxygen will be produced at STP on passing 1 F of electricity. (2 Marks) 

Q.3) Find the emf of following cell - (3 Marks) 

Q.4) Calculate molar conductivity of solution of MgCl2 at infinite dilution from the given data.

7.12 ohm–1 cm2 mol–1
= 76.34 ohm–1 cm2 mol–1  (2 Marks) 

Q.5) A current liberates 0.406 g of hydrogen in 2 hrs. Calculate the amount of copper deposited at the electrode when same amount of current is passed through it. (2 Marks) 

Q.6) Find the value of equilibrium constant from the following data- (2 Marks) 

Q.7) The resistance of 1N solution of CH3COOH is 250 ohm. The cell constant is 1.15 cm–1. Calculate the equivalent conductance of solution. (3 Marks) 

Q.8) What is the reference electrode in determining the standard electrode potential? (1 Marks) 

Q.9) Write the use of platinum foil in the hydrogen electrode. (1 Marks) 

Q.10) How will you identify whether the given electrolyte is a strong or a weak electrolyte? (1 Marks)