Listed below are certain characteristics of physical and chemical change. Name the correct characteristics for the respective change:
Undergoes temporary change. _______
Answers
Answer:
Explanation:
In a physical change, no new substance is formed. A chemical change is always accompanied by one or more new substance(s). Physical change is easily reversible i.e original substance can be recovered. Chemical changes are irreversible i.e. original substance cannot be recovered.
Temporary changes are changes that are reversible, that is they can be reverted. Example include: Water changes into ice. Water and oil are mixed.
Answer:
The sun rises, the night turns into a day, the seasons change, the leaves shed, flowers bloom and living beings grow! Every day, we see a number of changes happening around us. Change is inevitable. It takes place all the time and everywhere. However, changes differ from one another in a number of aspects. Some changes are fast, others are slow. Some of them are temporary, others are permanent.
Some are periodic, others are non-periodic. Some are natural, others are man-made. Some are reversible, others are irreversible. On the larger front, a change may be categorized into a chemical or a physical change depending on how the properties of a subject alter when it undergoes the change.
Physical Change
A substance is said to undergo a physical change when only the physical properties such as the shape, size, colour, state or appearance of the substance change. Its chemical composition remains intact. Some characteristics of a physical change are:
Temporary in nature.
Does not affect the internal structure of a substance, only the molecules are rearranged.
No new substance is formed.
Most of the physical changes are reversible. We can obtain the substance back even after the change.
Chemical And Physical Change
Some examples of a physical change are folding of a paper sheet, melting of wax, freezing and boiling water, melting of ice, condensation, vaporization, magnetizing a compass needle, dissolving sugar in water, etc.
Chemical Change
A substance is said to undergo a chemical change when the chemical properties of a substance alter. As a result, there is either formation or breaking of atomic bonds at the molecular level. Some characteristics of a chemical change are:
Permanent in nature.
Since the original composition of the substance changes, one or more new substances are formed.
Forms of energy, such as heat, light or electricity, may be emitted or absorbed.
A chemical change is generally irreversible. At least, it cannot be reversed by simple physical means.
Chemical And Physical Change
Some examples of a chemical change are burning of paper, burning of fuel, rusting of iron, the souring of milk, growth in a living being, cooking, digestion of food, burning of wood, etc.