Advertisements
Advertisements
Question
Name the following:
The final product of the physical change involved during the ‘melting of a piece of wax’.
Solution
Wax [CxHy]
APPEARS IN
RELATED QUESTIONS
State whether the following is physical or chemical changes.
lightning —
What is a physical change ? Give two examples of physical changes.
Classify the following as a physical or a chemical change.
Burning of coal
Change is the law of nature and occurs in our everyday life, at all times and in all places. Differentiate between the following change with a suitable example.
Desirable and undesirable change.
Fill in the blank with the appropriate word of the statement given below:
If a change is permanent and irreversible it is considered a _________ change.
State which of the following pertain to – chemical changes.
(a) Substance retains its identity
(b) The change is permanent
(c) No new substance is formed
(d) Is easily reversible
(e) Produces one or more new substances by a change in its composition
(f) The change is temporary
(g) The composition and properties of the original substance are not altered.
A change in which matter undergoes a change but the total mass of the substance is unaltered is a ______ change.
Give the reason why the following is considered as chemical changes.
An iron nail kept open in the atmosphere rusts.
When ice melts to form water, change occurs in its
A physical change is generally____________.
