Chemistry questions
29404 published questions with worked solutions.
- How many coulombs are required to produces 100 grams of calcium from molten CaCl_2 ? (at. weight of Ca = 40)
- Which of the following reaction will take place at the cathode during the electrolysis of an aqueous solution of sodium chloride?
- The cost of electricity required to deposit 1 gm of Mg is
- A current of 2.5 amperes was passed through a CuSO_4 solution for 6 minutes 26 seconds. The amount of Cu deposited is
- On passing electric current in to a solution of salt of metal, M the reaction at cathode takes place as : M^ 2+ + 2e^- M . The...
- A certain quantity of electricity is passed through an aqueous solution of AgNO_3 and cupric salt solution connected in series....
- 1.1081 gram of copper displaces 3.67 grams of silver from a solution of AgNO_3 . The equivalent weight Ag is 107.88. What is the...
- In electrolysis of water under alkaline conditions a total of 1 mole of gases is evolved. The amount of water decomposed would be
- If the current of 0.5 A passes for 40 min. through solution of AgNO_3 the quantity of electricity is :
- One mole of electrons is same as
- The amount of copper in moles deposited by the passage of 96,500 coulombs of electricity through copper sulphate solution is
- How many coulombs are required for the reduction of 1 mol of Cu^ 2+ to Cu?
- How many coulombs of electricity are required for oxidation of 1 mole of H_2O to O_2 ?
- On passing 0.01 Faraday of electricity through a solution of aluminium chloride, the weight of Aluminium metal (At. wt. = 27)...
- On passing one Faraday of electricity from an aqueous solution NiSO_4 (Atomic weight of Ni = 58.71, S = 32, O = 16) weight of Ni...
- The number of atoms of Cr discharged from CrCl_3 solution by passage of 1.5 faraday would be
- The same electric current is passed through solutions of ferrous sulphate, FeSO_4 , and silver nitrate, AgNO_3 . If the amount of...
- Electrochemical equivalent is the mass of the element liberated during electrolysis when
- When 1300 coulombs of electricity passed through CuSO_4 solution the amount of Cu deposited is
- An electric current is passed through aqueous solution of the following which one shall decompose?