Chemistry Electrochemistry SZABMU 2024
PMDC Verified Question 4 of 73
Which type of redox reaction takes place at cathode of the electrochemical cell?
A
Decomposition
B
Dissociation
C
Oxidation
D
Reduction
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Reduction
Concept:

Electrodes are fundamentally defined by the redox process that occurs upon them.

Solution:

  • By universal IUPAC definition, the cathode is the electrode where species acquire electrons.


  • The acquisition of electrons is called reduction (since the oxidation state is mathematically reduced).


  • Remember the mnemonic RED CAT (Reduction = Cathode) and AN OX (Anode = Oxidation).


Why other options are incorrect:

Oxidation always occurs at the anode. Decomposition and dissociation are generic reaction types, not specific electrode half-reactions.

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