Chemistry questions
29404 published questions with worked solutions.
- 0.1 ampere current is passed for 10 seconds through Cu and Ag. The metal that will deposit more is
- A certain current liberated 0.504 g of hydrogen in 3 hours. How many grams of copper can be liberated by the same current flowing...
- During electrolysis electrons are
- In a solution of CuSO_4, how much time will be required to precipitate 0.2 gram of copper by 0.5 ampere current?
- Rusting of iron is catalysed by which one of the following?
- Which of the following is not an anode reaction?
- The SRP of cadmium and copper electrodes are -0.4 volt and + 0.34 volt respectively. The e.m.f. of the cell formed from them is
- Maximum standard emf will be delivered by the cell consisting of the half cells
- The value of constant in Nernst equation E = E^0 - constant n ln Q at 25^ is
- E^0 of an electrode half reaction is related to G^0 by the equation E^0 = - G^0 nF . If the amount of Ag^+ in the half reaction...
- The atomic weight of Al is 27. When 5 Faraday current is passed through Al^ 3+ solution, the weight of Al deposited is
- The number of coulombs necessary to deposit 1g of potassium metal (molar mass 39 g mol^ -1 ) from K^+ ions is
- During electrolysis, 2 A current is passed through an electrolytic solution for 965 s. The number of moles of electrons passed...
- The e.m.f. of a cell depends on
- The SI unit of molar conductivity is
- The substance obtained at the cathode on electrolysis of NaOH solution
- The standard potential for the cell reaction 2 Tl(s) + Hg^ 2+ (1 , M ) 2 Tl^ + (1 , M ) + Hg(l) where E^0_ Tl^+/Tl = -0.34 V ,...
- E^0_ Red values of Mg/Mg^ 2+ is -2.37 V , Zn^ 2+ /Zn is -0.76 and Fe^ 2+ /Fe is -0.44 respectively. Which of following is correct?
- A silver cup is plated with silver by passing 965 coulombs of electricity. The amount of Ag deposited is
- When lead storage battery is charged