Problem 81 - A Complete Resource Book in Chemistry for JEE Main

Question

Which of the following is used in making ointment for curing skin disease? (a) \(\mathrm{ZnCO}_{3}\) (b) \(\mathrm{ZnSO}_{4}\) (c) \(\mathrm{ZnO}\) (d) \(\mathrm{ZnS}\)

Step-by-Step Solution

Answer

Zinc oxide (\(\mathrm{ZnO}\)) is used in making ointment for curing skin diseases.

Step 1: Identify the Purpose of Each Compound

First, identify the primary use of each compound listed. - \(\mathrm{ZnCO}_3\) is zinc carbonate, rarely used in dermatology.- \(\mathrm{ZnSO}_4\) is zinc sulfate, sometimes used for dietary supplementation but not in direct skin applications.- \(\mathrm{ZnO}\) is zinc oxide, commonly used in ointments and creams for skin protection due to its soothing properties.- \(\mathrm{ZnS}\) is zinc sulfide, not typically used for treating skin conditions.

Step 2: Determine the Most Relevant Compound

The most appropriate compound for skin ointments must have properties beneficial for skin application, usually acting as a barrier or anti-inflammatory agent.

Step 3: Select the Correct Answer

Based on the identified purposes, \(\mathrm{ZnO}\) (zinc oxide) is used in making ointments for skin diseases as it protects and soothes the skin.

Key Concepts

Dermatological Applications

Zinc oxide (BZnOC) is widely utilized in the field of dermatology. Its primary role is in topical applications, such as ointments and creams, where it offers numerous skin benefits. This compound acts as a protective barrier on the skin, shielding it from irritants and moisture. Additionally, it possesses anti-inflammatory properties.
Zinc oxide is effective in treating various skin conditions. Some of these conditions include diaper rash, minor abrasions, and burns. By forming a protective layer over the skin, zinc oxide prevents further irritation and helps in skin healing.
Using zinc oxide in dermatology is especially advantageous because of its mild nature. It's usually well-tolerated, reducing the risk of allergic reactions or adverse side effects. This makes it a preferable choice for sensitive skin.
In conclusion, zinc oxide's significance in dermatology lies in its ability to protect and heal the skin. It's these properties that make it a staple in many skincare products.

Inorganic Compounds

Inorganic compounds play an integral role in various applications, from industrial to medicinal. Inorganic compounds are generally composed of elements other than carbon, distinguishing them from organic compounds.
Zinc oxide (BZnOC), is an inorganic compound with versatile uses. It displays unique physical properties that lend it to applications beyond dermatology.
Zinc oxide is valued for its stability, non-reactivity, and ability to form a protective layer. These characteristics make it suitable for use in products requiring moisture and UV protection. For example, zinc oxide is a key ingredient in many sunscreens due to its ability to block ultraviolet rays effectively.
These unique properties are derived from its structure and composition as an inorganic compound. As a result, it manitains a stable and effective presence in formulations even when exposed to environmental elements.
In essence, zinc oxide exemplifies how inorganic compounds can be modified and utilized for various practical applications, driven by their unique chemical properties.

Skin Protection

Zinc oxide (BZnOC) is often associated with skin protection due to its comprehensive barrier-forming abilities. It effectively protects the skin from external aggressors like harmful UV rays and pollutants.
One of zinc oxide's most popular roles is in sun protection. It is among the few inorganic ingredients approved by regulatory authorities worldwide for use in sunscreens. Zinc oxide provides broad-spectrum UV protection, reflecting and scattering both UVA and UVB rays, thus minimizing the risk of sunburn and long-term skin damage.
Additionally, zinc oxide's protective properties extend to shielding the skin from irritants. This is why it's commonly found in products targeting diaper rash or irritation from prolonged moisture contact.
Understanding the function of skin protectants like zinc oxide aids in the selection of skincare products tailored to specific needs. It's an ingredient that provides efficacy while being gentle on the skin, making it an invaluable component in skincare formulations focused on protection.