Chemistry
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.
Phy & Chem Changes
1 Like
Answer
(a) False
Correct Statement — Heating of an iron rod is a physical change.
(b) True
(c) False
Correct Statement — Rusting of iron is a slow change.
(d) True
(e) False
Correct Statement — There is no change in the mass of a substance in a physical change.
Answered By
1 Like
Related Questions
Match the following:
Column A Column B (a) Freezing of water (i) Natural change (b) Change of seasons (ii) Chemical change (c) Burning of wood (iii) Physical change (d) Permanent change (iv) Sublimation (e) Heating of solid camphor (v) Fast process Name the following:
(a) The solid formed when vapours of a sublimable substance cool down.
(b) The compound formed when magnesium burns in air.
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.
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.