H-Chem- skincare

Where are free radical scavengers commonly added?

• In pharmaceuticals and medicines

• In cosmetics, food products, and plastics

• In cleaning products and detergents

• In electronic devices and batteries

How can equations involving free radicals be recognized?

• They represent a chemical equilibrium.

• They can be recognized as representing an initiation, propagation, or termination step.

• They are always balanced equations.

• They involve only ionic compounds.

What are free radical scavengers?

• Molecules that react with free radicals to form stable molecules and prevent chain reactions.

• Substances that promote the formation of free radicals in the body.

• Compounds that enhance oxidative stress and damage cells.

• Elements that are essential for the production of free radicals.

What is ultraviolet (UV) radiation?

• UV radiation is a high-energy form of light present in sunlight.

• UV radiation is a type of sound wave used in communication.

• UV radiation is a low-energy form of light that is invisible to the human eye.

• UV radiation is a form of radiation used in microwave ovens.

What effect does UV light have on molecules?

• UV light can provide sufficient energy to break bonds within molecules, causing sunburn and accelerating skin ageing.

• UV light has no effect on molecules at all.

• UV light only affects the color of molecules without breaking any bonds.

• UV light can cool down molecules, making them less reactive.

How do sun-block products work?

• They enhance the skin's natural ability to tan.

• They prevent UV light from reaching the skin.

• They increase the production of melanin in the skin.

• They provide a cooling effect on the skin.

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What are the steps in free radical chain reactions?

• Initiation, propagation, and termination.

• Activation, stabilization, and deactivation.

• Formation, reaction, and resolution.

• Start, middle, and end.

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