145 questions and answers in this section

Natural Sciences » Chemistry

Explain why bleach whitens clothing?

Explain why bleach whitens clothing?

When it comes into contact with colored tissues, the active ingredient in bleach, chlorine dioxide (ClO2), penetrates the fabric. It acts by attaching to the...

Read full answer

Explain why does newspaper absorb ink better than smooth paper?

Explain why does newspaper absorb ink better than smooth paper?

Newspaper paper is mainly made of recycled wood fibers from various types of paper, including newspapers, magazines, and flyers. These fibers are generally shorter and...

Read full answer

Explain why does alcohol disinfect wounds?

Explain why does alcohol disinfect wounds?

The most commonly used disinfecting alcohol is ethanol, also known as ethyl alcohol. It is a chemical compound composed of carbon, hydrogen, and oxygen, with...

Read full answer

Explain why does soap make oil stains disappear?

Explain why does soap make oil stains disappear?

Soaps are chemical products that are formed by reaction between fatty acids and a strong base, usually sodium hydroxide (caustic soda) or potassium hydroxide. Fatty...

Read full answer

Explain why water is wet?

Explain why water is wet?

Water is a molecule composed of two hydrogen atoms and one oxygen atom, linked by covalent bonds. The water molecule has a bent shape, with...

Read full answer

Explain why diamonds are so hard?

Explain why diamonds are so hard?

Diamonds are crystals composed only of carbon. Each carbon atom in a diamond is bonded to four other carbon atoms by strong covalent bonds. This...

Read full answer

Explain why is a flame colored?

Explain why is a flame colored?

The chemical elements present in a flame are responsible for the different colors it can produce. When a chemical element is introduced into the flame, it will...

Read full answer

Explain why paper changes color when it is burned?

Explain why paper changes color when it is burned?

Paper is mainly composed of cellulose fibers, primarily from wood, but also from recycled paper pulp or other plant materials. Cellulose is a polysaccharide, a...

Read full answer

Explain why does chocolate melt in the mouth?

Explain why does chocolate melt in the mouth?

Chocolate is solid at room temperature due to its crystalline structure. The main component of chocolate, cocoa butter, is a complex mixture of saturated and...

Read full answer

Explain why traffic lights are generally red, yellow, and green.

Explain why traffic lights are generally red, yellow, and green.

Traffic lights typically use specific pigments to produce the colors red, yellow, and green. Red is obtained using titanium dioxide or cadmium selenium, while yellow...

Read full answer