NCERT Exemplar Solutions Class 9 Science Solutions for Is Matter Around Us Pure ? - Exercise in Chapter 2 - Is Matter Around Us Pure ?

Question 4 Is Matter Around Us Pure ? - Exercise

Tincture of iodine has antiseptic properties. This solution is made by dissolving

(a) iodine in potassium iodide

(b) iodine in vaseline

(c) iodine in water

(d) iodine in alcohol


The answer is (d) iodine in alcohol


The tincture is prepared by using 2-7% elemental iodine and either of potassium iodide or sodium dissolved in alcohol. Since alcohol is a good solvent and iodine does not dissolve in water answer should be alcohol.

Connect with us on social media!
2022 © Quality Tutorials Pvt Ltd All rights reserved