Which formula has reaction of Oxidation Daniell cell ?
4 mol dm–7
Cn(s) → Mn2+ + 2e–
CH(s) → O2+ + 2e–
Zn(s) → Zn2+ + 2e–
The question asks for the oxidation reaction occurring in a Daniell cell. A Daniell cell is a type of galvanic cell that converts chemical energy into electrical energy through spontaneous redox reactions. We need to identify the anode (where oxidation occurs) and its corresponding half-reaction.
Correct Option: D) Zn(s) → Zn 2+ + 2e –
This option correctly represents the oxidation of solid zinc metal into zinc ions and two electrons, which is the characteristic oxidation reaction at the anode of a Daniell cell.
Which formula has reaction of reduction Daniell cell ?
Cn(s) → Mn2+ + 2e–
Zn(s) → Zn2+ + 2e–
Cu2+ + 2e– → Cu(s)
CH(s) → O2+ + 2e–
The question asks for the reduction reaction in a Daniell cell. A Daniell cell is a type of galvanic (voltaic) cell that generates electrical energy from a spontaneous redox reaction. In such a cell, oxidation occurs at the anode and reduction occurs at the cathode. We need to identify the half-reaction that represents reduction.
C) Cu 2+ + 2e– → Cu(s) — This reaction shows copper ions (\(\text{Cu}^{2+}\)) gaining two electrons to form solid copper metal (\(\text{Cu(s)}\)). This is a reduction reaction, which occurs at the cathode in a Daniell cell.
The question asks to identify which of the given options can be called a reduction half-cell. A reduction half-cell is where reduction, the gain of electrons, occurs. We need to recall the standard setup of galvanic cells and the roles of different electrodes.
B) Copper Electrode — In a Daniell cell, which is a common example of a galvanic cell, the copper electrode acts as the cathode where reduction of copper ions to copper metal takes place. Therefore, it is the reduction half-cell.
The question asks to identify which component in an electrochemical cell can be called the oxidation half-cell. This requires understanding the basic principles of electrochemistry, specifically what happens at the anode (oxidation) and cathode (reduction) in a galvanic cell.
Correct Option: D) Zinc Electrode — In an electrochemical cell, the zinc electrode typically acts as the anode, where oxidation (loss of electrons) takes place. Therefore, it is called the oxidation half-cell.
This question relates to the fundamental principles of electrochemistry, specifically the process occurring at an electrode when it is immersed in an electrolyte. The key concept here is the tendency of certain atoms to lose electrons and enter the solution as ions, which is characteristic of the oxidation half-reaction at an anode.
A) Metal Atoms — Metal atoms inherently possess the tendency to lose electrons and form positive ions when in contact with an electrolyte. This process, known as oxidation, causes the metal atoms to dissolve into the solution as ions, leaving the electrons on the electrode surface. This is a fundamental principle of electrochemistry and the operation of galvanic cells.
The question asks about the unit of measurement for the potential difference (cell potential) in a galvanic cell. This is a fundamental concept in electrochemistry and physics related to electrical potential.
Correct Option: B) Measured in Volts