WebThe relationship between Gibbs free energy of the cell reaction in a galvanic cell and the emf of the cell Δ r G c e l l = − n F E c e l l Where Δ r G c e l l = Gibbs free energy of the reaction F=Faraday constant E c e l l = Emf of the cell. n = Number of moles of electrons transfer in the redox reaction
Which one of the following reactions is a redox reaction?
WebRedox reaction Any chemical process in which the oxidation number of a participating chemical species changes is an oxidation-reduction reaction, often known as a redox reaction. The phrase refers to a broad range of processes. Electrons travel between reactants that are already in touch in a redox reaction. Web1. Which of the following represents a redox reaction? NaOH + HCl → NaCl + H 2 O BaCl 2 + H 2 SO 4 → BaSO 4 + 2HCl CuSO 4 + 2H 2 O → Cu (OH) 2 + H 2 SO 3 Zn + 2HCl → ZnCl 2 + H 2 Answer: (d) 2. Which reaction involves neither oxidation nor reduction? CrO 42- -→ Cr 2 O 72- Cr → CrCl 3 Na → Na + 2S 2 O 32- → S 4 O 62- Answer: (a) 3. cade johnson nfl team
Class 11 Chemistry Chapter 8 Redox Reactions MCQs - BYJUS
WebA redox reaction is any chemical reaction in which the oxidation number of a molecule, atom, or ion changes by gaining or losing an electron. Chromium and iron are involved in the reaction which is oxidised and reduced. So, a total of 6 electrons are involved in this redox reaction. Hence option (4) is the answer. 7. WebThus, redox reaction can be defined as the reaction in which both oxidation and reduction takes place simultaneously. It involves that there should be loss of electrons by one element and gain by another elements, both which are part of the chemical reaction. Example: Cu 2 + ( aq) + Zn ( s) → Cu ( s) + Zn 2 + ( aq) WebThe correct option is A Cr2O3+2Al Δ −→ Al2O3+2Cr. More electropositive element displaces less electropositive element. Cr2O3+2Al Δ −→ Al2O3+2Cr. Reaction (a) and (d) are decomposition reaction. Reaction (c) is a single displacement reaction but it does not displace a metal. Hence, option (b) is the correct answer. Suggest Corrections. cmake the c compiler