Electrochemistry questions
1808 published questions with worked solutions.
- Which compound, when dissolved in water, conducts electricity and forms a basic solution ?
- Zinc is used to protect iron from corrosion because zinc is
- Which one of the following represents the correct order of electron releasing tendency of metals ?
- To protect steel and iron from rusting, a thin layer of which one of the following metals is applied ?
- Which one of the following is the correct reactivity series with water?
- Which one of the following solutions is not capable of conducting electricity?
- Which one of the following is the correct arrangement of metals in the decreasing order of their reactivity ?
- Galvanization is a method of protecting iron from rusting by coating with a thin layer of
- Consider a 70% efficient hydrogen-oxygen fuel cell working under standard conditions at 1 bar and 298 K. Its cell reaction is H...
- Some standard electrode potentials at 298 K are given below: Pb ^ 2+ / Pb -0.13 V Ni ^ 2+ / Ni -0.24 V Cd ^ 2+ / Cd -0.40 V Fe ^...
- The reduction potential (E^0, in V) of MnO _4^-(aq)/ Mn (s) is _____. [Given: E^0_ ( MnO _4^-(aq)/ MnO _2(s)) = 1.68 V; E^0_ (...
- An aqueous solution of hydrazine ( N _2 H _4) is electrochemically oxidized by O _2, thereby releasing chemical energy in the...
- Given below are two statements : Statement-I : For KI, molar conductivity increases steeply with dilution. Statement-II : For...
- In 3d series, the metal having the highest M^ 2+ /M standard electrode potential is
- For the reaction taking place in the cell: Pt(s) |H_ 2 (g) |H^ + (aq) || Ag^ + (aq) | Ag(s) E°_cell = +0.5332 V. The value of _...
- The limiting molar conductivities of NaI, NaNO_ 3 and AgNO_ 3 are 12.7, 12.0 and 13.3 mS m^ 2 mol^ -1 , respectively (all at...
- Match List-I with List-II : List-I (Reaction): (a) Cd(s) + 2Ni(OH)_ 3 (s) CdO(s) + 2Ni(OH)_ 2 (s) + H_ 2 O(l) (b) Zn(Hg) + HgO(s)...
- For the given reactions Sn^ 2+ + 2e^ - Sn and Sn^ 4+ + 4e^ - Sn, the electrode potentials are; E^ (Sn^ 2+ /Sn) = −0.140 V and E^...
- The solubility product of a sparingly soluble salt A_ 2 X_ 3 is 1.1 10^ -23 . If specific conductance of the solution is 3 10^ -5...
- The quantity of electricity of Faraday needed to reduce 1 mol of Cr_ 2 O_ 7 ^ 2- to Cr^ 3+ is _____
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