Which of the following is a compound of iodine used for iodization of salt?

BTSC 3 August 2025

Applied Nutrition & Dietetics

Easy

Appeared in: BTSC 3 August 2025

Explanation

Potassium iodate (KIO₃) is the primary compound used for the iodization of edible salt.
It is an oxidizing agent and is highly stable, especially in warm and humid climates, which prevents the loss of iodine during storage and cooking.
Universal salt iodization is a key public health strategy endorsed by WHO and UNICEF to combat Iodine Deficiency Disorders (IDDs).
In India, the National Iodine Deficiency Disorders Control Programme mandates the use of iodized salt.

Option A: Sodium nitrate is a preservative and color-fixing agent used in processed meats; it does not contain iodine and is not used for salt iodization.
Option B: Calcium carbonate is a source of calcium and is used as a dietary supplement or an antacid. It has no iodine content.
Option D: Potassium chloride is primarily used as a salt substitute for individuals on sodium-restricted diets or to treat potassium deficiency. It does not contain iodine.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Micronutrient supplementation and public health programs as background academic context rather than a clinical decision trigger.
Understanding the importance of salt iodization is crucial for community health nursing, as it is a cornerstone of preventing Iodine Deficiency Disorders (IDDs) like goiter, hypothyroidism, and cretinism.
Nurses play a vital role in educating communities about the necessity of using only iodized salt to prevent cognitive and developmental issues in children.
What if? If a patient presents with symptoms of hypothyroidism (fatigue, weight gain, cold intolerance) and lives in a region known for endemic goiter, a nurse should consider assessing their dietary habits, including the type of salt they consume, as part of the initial investigation.

How to Approach the Question

First, identify the key terms in the question: 'compound of iodine' and 'iodization of salt'.
The question is asking for a specific chemical used to add iodine to table salt.
Analyze the options provided. You are looking for a compound that contains 'iodine' or is known for this specific public health application.
Eliminate options that are clearly used for other purposes. Sodium nitrate is a preservative, calcium carbonate is an antacid/calcium source, and potassium chloride is a salt substitute.
This leaves Potassium iodate. The 'iodate' part of the name strongly suggests it contains iodine, fitting the question's requirement.
Confirm the choice based on knowledge of nutritional public health programs. Salt iodization is a well-known intervention.

Concept Tested & Keywords

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