Substances in Common Use — Science STD 9 — Question
Maharashtra BoardEnglish MediumSTD 9ScienceSubstances in Common Use5 Marks
Question
Why are deodorant used? Give their types and content.
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Answer
Body odour is caused by the bacterial decomposition of the sweat. A deodorant is used to prevent this odour.
Deodorants contain parabens (methyl, ethyl, propyl, benzyl and butyl) and also alcohol in large proportions. Aluminium compounds and silica are also used.
Types of deodorants are : (a) Ordinary deo: It contains a smaller proportion of aluminium. It decreases the odour of the sweat. (b) Antiperspirant deo : This decreases the extent of sweating. It contains about 15% of aluminium chlorohydrate. It clogs the sweat pores on the skin. (c) Clinical deo : Some people sweat heavily and it has harmful effects on the skin. Clinical deo is meant for such people. It contains 20 to 25% aluminium. It is used during the night.
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