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You can't glue together a divided pear,if you want it to be valuable but it is not a chemical change..why?-The reason is that a chemical change is followed by entirely new product and what you have done is to seperate the pear molecules,it is still a pear!,and it is a physical change,and you are free to ask more question,because I understand that a pear has life..
What else can I help you with?
Is cutting your fingernails physical or chemical change?
Cutting your fingernails is a physical change because the composition of the material (keratin) remains the same before and after cutting. A chemical change involves a change in the chemical composition of a substance.
Why cutting of grass is a physical change?
Cutting doesn't change the chemical composition.
Is cutting your hair a reversible or irreversible physical change?
Cutting your hair is a reversible physical change because it can grow back over time. The structure of the hair is not permanently altered by cutting it.
Is fireworks a physical change?
Yes, fireworks involve a chemical reaction where the materials inside the firework combine to produce light, heat, and sound. This chemical reaction is not reversible, so it is considered a chemical change rather than a physical change.
Is a wax burning a reversible change?
No, burning wax is an irreversible change. When wax is burned, it undergoes a chemical reaction that changes it into different substances (carbon dioxide, water vapor, and heat) that cannot be easily reversed.
Is digesting a banana a chemical reaction or is a reversible change?
Digesting a banana is a chemical reaction, an ireversible change.
Is boiling water to make tea a reversible change or a chemical reaction?
it's a reversible change
Cutting up a pear chemical reaction or reversible?
It's chemical because you can't get the pear back to a whole.
Is making crisps from cooking oil and potatoes a reversible change or chemical reaction?
Most cooking processes are chemical reactions. Generally, the reactions are non reversible and once cooked, food cannot be returned to an uncooked state. So, frying potatoes causes a non reversible chemical reaction. The question is not as precise as it might be. Changes can be physical or chemical. They can also be reversible or non reversible but it is important to note that many chemical changes are reversible just as many physical changes are reversible.
Evaporation and condensation are what reaction?
Not chemical reactions, but change of phases
Is solidification a reversible change re cakes?
no it is not reversible because a chemical reaction has taken place that cannot be reversed.
How is making a fire chemical reaction?
A chemical reaction is irreversible, while a physical change is reversible. Fire is a chemical reaction because you can't get back the products.
Is cutting your fingernails physical or chemical change?
Cutting your fingernails is a physical change because the composition of the material (keratin) remains the same before and after cutting. A chemical change involves a change in the chemical composition of a substance.
Is dissecting a banana a chemical reaction or a reversible change?
Dissecting a banana is a physical change, not a chemical reaction. It involves physically separating the banana into smaller pieces, but the chemical composition of the banana doesn't change. A reversible change would be when you freeze the banana slices and then thaw them, as this can be reversed.
Is digesting a banana a chemical reaction or is it a reversible change?
Digestion involve chemical reactions, it is a chemical and mechanical process and is irreversible.
Why cutting of grass is a physical change?
Cutting doesn't change the chemical composition.
Is toasting of bread a physical or chemical change?
Physical ------------------- It is a chemical change because some compounds from bread are thermally decomposed. The reaction is not reversible.
