Chemistry
Give one example of the following changes:
(a) Natural, non-periodic change
(b) Natural, periodic change
(c) Irreversible, physical change
(d) A chemical change in which energy is absorbed.
(e) A man-made fast change.
(f) A process in which both physical and chemical changes take place simultaneously.
Related Questions
Write true or false against the following statements and correct the false ones.
(a) Heating of an iron rod is a chemical change.
(b) Condensation of steam is not a chemical change.
(c) Rusting of iron is a fast change.
(d) A physical change is reversible.
(e) There is a change in the mass of a substance in a physical change.
Classify the following as a physical or a chemical change:
(a) Drying of wet clothes.
(b) Curdling of milk.
(c) Butter getting rancid.
(d) Boiling of water
(e) Burning of paper
(f) Melting of wax
(g) Burning of coal
(h) Formation of clouds
(i) Rusting of iron
(j) Roasting of potatoes
(k) Formation of alloys
(l) Making of a sugar solution
(m) Glowing of an electric bulb
(n) Manufacture of salt from sea water.
Define:
(a) a physical change
(b) a chemical change
Differentiate between Periodic and non-periodic changes.