SATHEE: Redox Reactions And Electrochemistry Ques 85

Redox Reactions And Electrochemistry Ques 85

Question: On the basis of the electrochemical theory of aqueous corrosion, the reaction occurring at the cathode is [MP PET 1994; UPSEAT 2001]

Options:

A) $O_{2, (g)} + 4 H_{(a q)}^{+} + 4 e^{-} \to 2 H_{2} O_{(l)}$

B) $F e_{(s)} \to F e_{(a q)}^{2 +} + 2 e^{-}$

C) $F e_{(a q)}^{2 +} \to F e_{(a q)}^{3 +} + e^{-}$

D) $H_{2 (g)} + 2 O H_{(a q)}^{-} \to 2 H_{2} O_{(l)} + 2 e^{-}$

Show Answer

Answer:

Correct Answer: A

Solution:

At cathode : $2 {H^{+}}_{(a q)} + 2 e^{-} \to 2 H$ $2 H + \frac{1}{2} O_{2} \to H_{2} O$

$\overset{―}{2 H^{+} + \frac{1}{2} O_{2} + 2 e^{-} \to H_{2} O}$

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Redox Reactions And Electrochemistry Ques 85

Question: On the basis of the electrochemical theory of aqueous corrosion, the reaction occurring at the cathode is [MP PET 1994; UPSEAT 2001]

Options:

Answer:

Solution:

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