4 Answers | Add Yours
physical change is when nothing really changed. for example, if ou tear a piece of paper in half, you still have paper, nothing really changed. chemical change results in the formation of one or more new substance(s) example would be you burning the paper, you will end up having carbon and no paper
so in this case, if you just cut a carrot, you still have carrot, nothing really changed.
The distinction between chemical and physical change is not based on whether the change is reversible. Bot physical change can be reversible to varying degree. Stretching of a rubber band as well as a chewing gum, are both physical change. However stretching of rubber band is easily reversible process, while that of chewing gum is not. Similarly, Iron is made by reduction of oxides of iron in the form of iron ores. This is a chemical change. However this iron again turns to iron oxide in the process of rusting. In contrast it is very difficult to reverse the chemical change of oxygen and hydrogen combining to form water.
An essential requirement of any chemical change is that it results in molecular composition of the substances subject to change. Such change in the molecular composition also results in at least some change in chemical properties. In a physical change there ins no change in molecular composition, or in any chemical properties.
Cutting of a vegetables only changes the shape of the substances of which the vegetable is made. But the chemical property of the substance in whole vegetable remains same as the chemical property of the substances in each of the cut piece of vegetable. Therefor, cutting of vegetable is a physical change.
When you cut vegetables you make a change in their physical shape. There is no chemical change involved here. The chemicals which constituted the vegetables before you cut them remain the same as after you cut them.
If a change is permanent it does not mean that it is a chemical change. You can take a sheet of aluminum foil, cut it, wrap it around a sandwich, crush it into a ball, or do anything, but the aluminum remains the same. There is no chemical change.
To make a chemical change in the vegetables you can cook them, or add chemicals that the vegetables would react to, that would be a chemical change.
any physical deformation can be considered as a physical change.
so it is also.
but if the knife or the instrument by which u r cutting the veg.s react with vegetables ----in that case it will surely be a chemical reaction
We’ve answered 318,994 questions. We can answer yours, too.Ask a question