Advertisements
Advertisements
Question
Try segregating the things around you as pure substances or mixtures.
Solution
- Pure substance: Distilled water, diamond; graphite, gold, sulphur.
- Mixture: Curd, ice cream, kerosene oil, cooking oil, steel, vulcanised rubber, solder wire (an alloy of lead and tin).
APPEARS IN
RELATED QUESTIONS
Classify the following as chemical or physical change:
Melting of butter in a pan
Write short answer.
What are man-made changes ?
State whether the following is physical or chemical changes.
mixing oil with water —
State the Differences Between a Physical Change and a Chemical Change.
Fill in the blank with the correct word of the statement given below:
Sublimation of iodine is an example of _________ 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.
Select the chemical changes from the following list of changes
Change of seasons
Gas exists in three states as solid, liquid, and gas.
Water is the universal solvent. Why?
Give two examples for each of the following cases:
Physical changes which are not reversible.
