Problem 5 - 43 Years JEE ADVANCED (1978-2020) + JEE MAIN Chapterwise & Topicwise Solved Papers Chemistry

Question

Which of the vitamins given below is water soluble? (a) Vitamin E (b) Vitamin \(\mathrm{K}\) (c) Vitamin \(\mathrm{C}\) (d) Vitamin D

Step-by-Step Solution

Answer

Vitamin C (option c) is water-soluble.

Step 1: Understanding Water-Soluble Vitamins

Vitamins are classified into two categories: water-soluble and fat-soluble. Water-soluble vitamins dissolve in water and are not stored by the body, so they must be consumed regularly. Fat-soluble vitamins, on the other hand, are stored in the body's fatty tissues.

Step 2: Identifying Fat-Soluble Vitamins

Fat-soluble vitamins include Vitamins A, D, E, and K. These vitamins are stored in the liver and fatty tissues and are used by the body when needed. Therefore, they are not water-soluble.

Step 3: Recognizing Water-Soluble Vitamins

Water-soluble vitamins primarily include the B-complex group and Vitamin C. These vitamins dissolve in water, require regular consumption, and excess amounts are typically flushed out of the body through urine.

Step 4: Selecting the Correct Answer

Given the options: (a) Vitamin E, (b) Vitamin K, (c) Vitamin C, and (d) Vitamin D, identify which is a water-soluble vitamin. From the previous step, we know Vitamin C is water-soluble, while Vitamins E, K, and D are fat-soluble.

Key Concepts

Fat-Soluble Vitamins

Fat-soluble vitamins are a group of essential nutrients that your body absorbs along with dietary fats. Unlike their water-soluble counterparts, these vitamins are stored in the body's fatty tissues and liver. This means that the body can draw upon these stored reserves when dietary intake is low.
Understanding the nature of fat-soluble vitamins is essential because it highlights the need for balanced consumption.

• Vitamin A: Important for vision, immune function, and skin health.
• Vitamin D: Crucial for bone health as it aids in calcium absorption.
• Vitamin E: Acts as an antioxidant, protecting cells from damage.
• Vitamin K: Essential for blood clotting and bone metabolism.

Overconsumption of fat-soluble vitamins can lead to toxicity because they are not excreted as easily as water-soluble vitamins. Therefore, consuming these vitamins in appropriate amounts is critical for maintaining health.

Vitamins Classification

Vitamins are vital nutrients that our bodies need to function properly, and they are classified based on their solubility:

• Water-Soluble Vitamins: These include the B-complex vitamins and vitamin C. They dissolve in water, and the body does not store them, necessitating regular dietary consumption.
• Fat-Soluble Vitamins: Comprising vitamins A, D, E, and K, these dissolve in fats and oils and are stored in fatty tissues and the liver.

Classification of vitamins into these two categories helps in understanding their different roles in bodily functions and dietary needs.
Both types of vitamins are crucial for health, but their differing storage and excretion methods mean different considerations for dietary planning.

Bodily Storage of Vitamins

The way the body stores vitamins highlights the differences between water-soluble and fat-soluble vitamins. Water-soluble vitamins, such as vitamin C and the B-vitamins, are not stored in the body. Any excess amounts are excreted through urine, which is why they must be consumed regularly in the diet to meet daily needs.
In contrast, fat-soluble vitamins are stored in the liver and fatty tissues. This storage ability allows the body to build reserves of these vitamins, using them when dietary intake is insufficient. While this storage is beneficial, it also means that fat-soluble vitamins can accumulate to toxic levels if consumed excessively.
Understanding these storage mechanisms is important for preventing both deficiencies and toxicities, ensuring a balanced intake that supports overall health.