Chemistry questions
29404 published questions with worked solutions.
- For the electrochemical cell M|M^+||X^-|X , E^ ( M/M^+ ) = 0.44 V ; E^ ( X^-/X ) = -0.33 V Therefore _____
- If the Zn^ 2+ and Cu^ 2+ concentrations are 0.1 M and 10^ -9 M respectively at 25^ , the potential of the cell containing Zn/ Zn^...
- The standard oxidation potential of Zn and Ag at 20^ are Zn_ (s) Zn^ 2+ _ (aq) + 2e^-; E^ = 0.76 V Ag_ (s) Ag^+_ (aq) + e^-; E^ =...
- The hydrogen electrode is dipped in a solution of pH = 3 at 25^ . The potential of the cell would be (the value of 2.303 ,RT/F is...
- Which is the CORRECT Nernst equation for reaction taking place in the following cell? Mg_ (s) |Mg^ 2+ _ (aq) ||Cl^-_ (aq) |Cl_...
- The potential of the cell for the reaction M_ (s) + 2H^+(1M) H_ 2(g) , (1 atm) + M^ 2+ (0.1M) is 1.500 V. The standard reduction...
- If [ Zn^ 2+ ] = 0.1 M and E^ = -0.76 V then half cell potential at 298 K for the reaction Zn^ 2+ _ (aq) + 2e^- Zn_ (s) is _____
- Calomel electrode is _____
- During the use of lead storage battery, _____
- Which of the following is the reduction half – reaction for a storage battery?
- When lead accumulator is getting charged, it functions as a/an _____ cell
- In dry cell, the reaction which takes place at the anode is _____
- In the dry cell, _____
- During charging of lead storage cell, _____
- Which of the following is WRONG regarding fuel cell?
- In H_2 - O_2 fuel cell the electrodes are made up of _____
- Which of the following is NOT used as a fuel in fuel cell?
- If the half cell reaction A + e^- A^- has a large negative reduction potential, it follows that _____
- Li, Ca and K metals may be arranged in the decreasing order of their standard oxidation electrode potentials as _____
- Zinc is used to protect iron from rusting because _____