Advertisements
Advertisements
प्रश्न
State why addition of sodium chloride to water is considered a physical change, while addition of dilute sulphuric acid to zinc is considered a chemical change.
Advertisements
उत्तर
Addition of sodium chloride to water is considered a physical change because it does not form any new substance. but when the addition of dilute sulphuric acid is added to zinc. They forms zinc-sulphate hence it is considered as a chemical change.
APPEARS IN
संबंधित प्रश्न
Classify the following as chemical or physical change:
Cutting of trees
What are reversible and irreversible changes ? Give one example for each.
State whether the following is physical or chemical changes.
shaping a piece of glass —
Write true or false
Deforestation is a man-made change.
What is a chemical change ? Give two examples of chemical changes.
Which of the following are physical changes and which are chemical changes ?
Classify the Following as a Physical Or a Chemical Change.
Formation of Clouds
Give the reason why the following is considered as chemical changes.
Sulphur when burnt in air evolves a gaseous acidic product.
Wood to sawdust:______:: Wood to Ash: Chemical change
Give two examples for the following case:
Physical changes which are reversible
