Question

What is tincture of iodine?
A. $2\%-3\%$ solution of iodine in alcohol-water mixture.
B. A mixture of iodine in chloroxylenol.
C. A mixture of $0.2\%$ phenol and $2\%-3\%$ iodine in water.
D. $2\%-3\%$ solution of iodine in potassium iodide.

Answer 1

Hint:-Iodine has topical antimicrobial properties and people have been using it to treat wounds for many years. Basic iodine ends up being harmful whenever ingested in sums bigger than needed to sanitize.

Complete answer:
Tincture of iodine is a weak or dilute solution of elemental iodine with sodium iodide or potassium iodide in water and alcohol. Ethanol is mostly used in forming the solution. Tincture of iodine is also known as ‘Iodine tincture’. Iodine tincture contains $2\%-7%$ of elemental iodine and the rest of the solution is constituted by either $Nal$ or $Kl$.

Additional Information: It acts primarily as an antiseptic and can be applied on cuts, scrapes and acute wounds. It frequently includes water as disinfectant against microorganisms like microbes and infections yet isn't compelling against protozoan parasites. Be that as it may, it is known to supply wholesome iodine multiple times more than the suggested stipend every day per litre.
It can also be used to sanitize the other surfaces of fruits, vegetables and other edible products. It is found in first aid kit and emergency survival kit to disinfect wounds. It is made accessible in the survival kit since it can clean surface water and make it fit for drinking.
Hence, the correct option is (A) $2\%-3\%$ solution of iodine in alcohol-water mixture.

Note: It is to be noted that though potassium iodide is used in making tincture of iodine but both iodine and $Kl$ are dissolved in the alcohol-water medium. We may mistake option (D) as the answer but it is not the case since tincture of iodine is not the solution of iodine in $Kl$ medium.