Question

Baking soda is rubbed to relieved pain from string

Answer 1

Baking soda is basic in nature therefore it is rubbed at the area os sting and also because the sting is acidic in nature therefore to neutralise it baking soda is used.

Answer 2

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An ant's sting contains an acid and baking soda is a base. When baking soda is rubbed on ant's sting, it neutralizes the effect of acid. Thus, the pain caused due to ant's sting gets relieved by rubbing baking soda solution.