Solved UPSC CDS/OTA Question
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Q · Soap and DetergentsMedium · 45s
Which of these is true regarding the alkali used for soap making?
TopicSoap and Detergents
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained - no skipped algebra.
NaOH is for hard soaps; KOH for soft/liquid soaps.
Final Answer: Option B - NaOH for hard soaps, KOH for soft soaps