Question

1) Give two examples of chemical changes that occur in laboratory with their word equation 2) Write difference between photosynthesis and respiration. 3) Explain thermal expansion in solids with the help of an example.​

Answer 1

Answer:

Simple examples of evidence of chemical change include: a temperature change away from room temperature, changes in phase (a gas, a liquid, or a solid), change in color, solubility or precipitation (forming a new solid), how clear a solution is, and anything new and different or unexpected.