Advertisements
Advertisements
Question
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
Solution
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
RELATED QUESTIONS
Fill in the blank.
When a candle burns, wax melts. Melting of wax is a ________ change.
Give the main differences between physical changes and chemical changes.
Classify the following as a physical or a chemical change.
Boiling of water
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 correct word of the statement given below:
Sublimation of iodine is an example of _________ change.
Give a reason why – Heating a platinum wire is a reversible change but, heating a magnesium wire is an irreversible change.
Select the chemical changes from the following list of changes
Breaking of glass
When solute is dissolved in a solvent it forms a solution.
Water is known as a universal solvent. Why?
What kind of change is shown by tearing of paper?
