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Phenol at 0.2 per cent acts as an antiseptic, but at 1 per cent it acts as a:
APainkiller
BDisinfectant
CPreservative
DSweetening
Answer & Solution
Correct answer: B. Disinfectant
1. The same chemical can play both roles.
2. Only its concentration changes.
3. At one per cent it is a disinfectant.
_Source: syllabus Chemistry Part II, Class XII, Chemistry in Everyday Life._
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