Advertisements
Advertisements
Question
Sublimation is classified as a physical change. Why ?
Advertisements
Solution
Physical changes are those in which no new substance is formed. In sublimation there is direct conversion of solid into gas and vice versa. Thus the substance remains the same.
APPEARS IN
RELATED QUESTIONS
Write short answer.
Name two reversible changes.
State whether the following is physical or chemical changes.
photosynthesis —
State whether the following is physical or chemical change.
Digestion of food —
Write true or false
Melting of ice is a physical change.
State the various conditions that favour the process of evaporation.
Which of the following are physical changes and which are chemical changes?
Burning of candle wax, Melting of candle wax, Mixing of iron filings and sand, Burning of wood, Breaking a piece of chalk, Burning a piece of paper, Cutting a piece of paper.
Given reason:
Cutting of a cloth piece is a physical change, though it cannot be reversed.
Change is the law of nature which occurs in everyday life.
State when a substance [i.e. matter] undergoes a kind of change.
Name the following.
The product of the chemical change in keeping a polished iron nail exposed to the atmosphere.
Classify the following as physical or chemical properties
Metallic sodium is soft enough to be cut with a knife.
