Which of the following reaction is possible at anode :- (1) F2 2e- -- 2F- (2) 2H 1/2 O2 2e- -- H2O (3). 2Cr2^3 7H20 -- Cr2O7^2- 14H 6e- (4) Fe^2 -- Fe^3 e-?

Question

Which of the following reaction is possible at anode :- (1) F2  2e- --> 2F- (2) 2H   1/2 O2  2e- --> H2O (3). 2Cr2^3   7H20 --> Cr2O7^2-   14H   6e- (4) Fe^2  --> Fe^3    e-?

Answer

In anode only ovidation ie loss of electrons happen

Answer

Explanation of Possible Reactions at Anode
- 1. F2 2e- --> 2F-
This reaction is possible at the anode as fluorine gas is being oxidized to fluoride ions by losing electrons. This is a typical oxidation reaction that occurs at the anode during electrolysis.
- 2. 2H 1/2 O2 2e- --> H2O
This reaction is not possible at the anode as hydrogen gas is being reduced to form water by gaining electrons. Anode reactions involve oxidation, not reduction.
- 3. 2Cr2^3 7H20 --> Cr2O7^2- 14H 6e-
This reaction is possible at the anode as chromium ions are being oxidized to form dichromate ions by losing electrons. This is a typical oxidation reaction that occurs at the anode during electrolysis.
- 4. Fe^2 --> Fe^3 e-
This reaction is not possible at the anode as iron ions are being reduced to form iron ions with a higher charge by gaining electrons. Anode reactions involve oxidation, not reduction.
In conclusion, reactions 1 and 3 are possible at the anode as they involve oxidation reactions, while reactions 2 and 4 are not possible as they involve reduction reactions. Anode reactions involve the loss of electrons, leading to the oxidation of species.

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