Question

The following stain removal, requires sunlight

• A. Blood
• B. Ink
• C. Turmeric
• D. Oil

Hint:

• Sunlight (UV radiation) can have a bleaching effect on some stains.
• Turmeric stains} (from curcumin pigment) are known to fade significantly or disappear when exposed to direct sunlight after washing. This is a common home remedy.
• Blood stains: Treat with cold water, enzymes.
• Ink stains: Vary; use appropriate solvents.
• Oil stains: Use solvents, degreasers, or detergents.
• Sunlight is not a general stain remover and can sometimes worsen or set other types of stains.

Answer 1

The Correct Option is C

Sunlight can aid in stain removal for certain types of stains, primarily through its bleaching effect (due to UV radiation) or by promoting certain chemical reactions. Let's consider the stains listed:

• (a) Blood: Blood stains are protein-based. They should be treated with cold water immediately. Enzymes (proteases) are effective. Sunlight is not a primary or recommended method for fresh blood stains and can even set some stains if heat is involved. For old, denatured blood stains, some bleaching action might occur over long exposure, but it's not a specific remedy.
• (b) Ink: Ink stains vary greatly depending on the type of ink (water-based, ballpoint, permanent marker). Removal methods involve solvents (alcohol, milk, specialized ink removers). Sunlight is not a general or effective treatment for most ink stains.
• (c) Turmeric (Haldi): Turmeric contains curcumin, a yellow pigment. Turmeric stains are notoriously difficult to remove completely with washing alone, as curcumin is a dye. However, curcumin is sensitive to light, especially UV light from the sun. Exposing a washed fabric stained with turmeric to direct sunlight can significantly fade or even completely remove the yellow stain. This is a well-known traditional method for dealing with turmeric stains on white or light-colored fabrics. The UV radiation helps to break down the curcumin molecule.
• (d) Oil (Grease/Oil stains): Oil stains are best treated with solvents, degreasers, or strong detergents that can emulsify or dissolve the oil. Sunlight does not help remove oil stains; it might even cause them to oxidize and set further.

Therefore, among the options, the removal of Turmeric stains is notably aided by exposure to sunlight. \[ \boxed{\text{Turmeric}} \]