Project ForgeChemical Technology
Inorganic Chemical Industries
GATE 2014
Medium
Decomposition efficiency (ηD) of an electrolytic cell used for producing NaOH is defined as
- AηD = (grams of NaOH produced / grams of NaCl decomposed) × 100
- BηD = (grams of NaOH produced / grams of NaCl charged) × 100
- ηD = (gram equivalents of NaOH produced / gram equivalents of NaCl charged) × 100
- DηD = (theoretical current to produce one gram equivalent / actual current to produce one gram equivalent) × 100
Explanation
Decomposition efficiency compares the gram-equivalents of desired product (NaOH) actually obtained to the gram-equivalents of raw material (NaCl) fed to the cell (charged), expressed as a percentage — it measures how efficiently the charged NaCl is converted, distinct from current efficiency (which compares theoretical vs actual current).
Source: GATE CH 2014 (2014)
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