MCQ practice · SSC Chemistry Board questions · Chapter 9: Acid-Base Balance
What is the main ingredient of toilet cleaner?
Think it through first, then pick an option.
- a NaOH
- b Ca(OH)₂
- c NH₄OH
- d Ca(OCl)Cl
Answer and explanation
Correct answer: a NaOH
The book says household toilet cleaner contains the alkali sodium hydroxide (NaOH).
Why the other options are wrong
- b Ca(OH)₂: Ca(OH)₂ is the alkali of lime water, not of toilet cleaner.
- c NH₄OH: NH₄OH is in glass cleaner, not toilet cleaner.
- d Ca(OCl)Cl: Ca(OCl)Cl is bleaching powder; the book names NaOH for toilet cleaner.
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