Question

(A) Name the acid present in ant sting and give its chemical formula. Give the common method to get relief from the pain and irritation caused by ant sting.

(B) Two solutions 'X' and 'Y' have pH values 3.0 and 9.5 respectively. Which of these will turn blue litmus to red and which will turn phenolphthalein from colourless to pink?

Accepted Answer

(A) Acid: **Methanoic acid** (Formic acid), formula: **$	ext{HCOOH}$**. Relief: Apply a mild base like baking soda ($	ext{NaHCO}_3$) solution. (B) Solution 'X' (pH 3.0, acidic) will turn **blue litmus to red**. Solution 'Y' (pH 9.5, basic) will turn **phenolphthalein from colourless to pink**.

Ant sting acid and pH indicator test

Explanation

Practise this under board exam conditions