Advertisements
Advertisements
Question
State the observations seen, when milk in a dish is kept aside for a few hours or more. Is the change which occurs – a physical change or a chemical change. Give reasons.
Advertisements
Solution
On keeping aside – the milk in a dish for a few hours or more. The change observed – will be that the milk has changed into curd. The change is permanent and cannot be reversed. New substance curd is formed. It is a chemical change.
APPEARS IN
RELATED QUESTIONS
Classify the following as chemical or physical change:
Boiling of water to form steam.
Classify the following as chemical or physical change:
Passing of electric current through water, and water breaking down into hydrogen and oxygen gases.
Fill in the blank.
An earthquake is a .................. change.
True or false
Is melting of ice a reversible change?
Write true or false
Decomposition of leaves is a fast change.
Fill in the blank.
The reaction in which energy is evolved is called
Fill in the blank with the correct word of the statement given below:
Sublimation of iodine is an example of _________ change.
Select the chemical changes from the following list of changes
Preparation of carbon dioxide from calcium carbonate & dilute hydrochloric acid.
Name the following.
The salt obtained when a chemical change takes place on the addition of iron to dilute sulphuric acid.
Cutting a log of wood into pieces is a chemical change.
