Chemical reaction

The transcript explains how chemical reactions involve the transformation of substances through the breaking and formation of chemical bonds, resulting in new products. It contrasts chemical reactions with physical processes like melting or dissolving, where particles rearrange without changing their inherent properties.

What is the primary mechanism through which substances change into different products in a chemical reaction?

• By mixing with other substances

• Through evaporation

• Through the breaking and formation of chemical bonds

• By changing their physical state

Which of the following is NOT a characteristic of a chemical reaction?

• Rearrangement of particles without changing their nature

• Formation of chemical bonds

• Breaking of chemical bonds

• Formation of new products

How does a chemical reaction differ from a physical process?

• Chemical reactions involve the formation of new substances, while physical processes do not

• Physical processes create new chemical bonds

• Physical processes involve chemical bonds breaking

• Chemical reactions do not involve any change in substances

Which of the following is an example of a physical process?

• Photosynthesis

• Rusting

• Melting

• Combustion

What happens to particles during a physical process like dissolving?

• They form new chemical bonds

• They change into different substances

• They rearrange without changing their nature

• They break down into simpler substances