Advertisements
Advertisements
Question
Separate the following into physical and chemical changes :
Sublimation of a solid, Decomposition of water into hydrogen and oxygen by passing electric current, Formation of clouds, Making a fruit salad from raw fruits, Dissolving carbon dioxide in water
Advertisements
Solution
Physical change: Sublimation of a solid, making a fruit salad from raw fruits, formation of clouds, and dissolution of carbon dioxide in water Chemical change: Decomposition of water into hydrogen and oxygen by passing electric current (electrolysis)
APPEARS IN
RELATED QUESTIONS
Fill in the blank.
A new substance is formed in a ............... change.
Write true or false for the statement.
Dissolving of solute in a solvent and rusting of iron are both physical changes.
Given reason:
Burning of paper is a chemical change.
Differentiate between a physical change and a chemical change with reference to – Nature of change is temporary and reversible or permanent and irreversible.
Fill in the blank with the correct word of the statement given below:
Sublimation involves a __________ change.
Give a reason why – Heating a platinum wire is a reversible change but, heating a magnesium wire is an irreversible change.
Give a reason why rusting of iron is a chemical change but, the magnetization of iron is a physical change.
Digestion of food is a physical change.
Ice, water and water vapour look different and display different ______ properties but they are ______ the same.
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Do you think rust is different from iron?
