Advertisements
Advertisements
Question
Classify the following processes into physical or chemical changes:
- Beating of aluminium metal to make aluminium foil.
- Digestion of food.
- Cutting of a log of wood into pieces.
- Burning of crackers.
Advertisements
Solution
- Beating of aluminium metal to make aluminium foil – physical change
- Digestion of food – chemical change
- Cutting of log of wood into pieces – physical change
- Burning of crackers – chemical change
APPEARS IN
RELATED QUESTIONS
Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.
(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)
Rusting of iron is a ______ chemical change.
Explain by writing a word equation.
Bubbles are seen on adding lemon juice to baking soda.
Give a chemical test to distinguish between the following gases.
SO2 and Cl2
Explain the term ‘chemical reaction’ with special reference to – ‘reactants’ and ‘products’.
Give two examples where a chemical reaction is accompanied by a change in colour of the reactants and products on completion of the reaction.
______ is not a chemical change.
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 formation of rust from iron is a chemical change?
Rusting of iron is ______.
Magnesium + oxygen → magnesium oxide.
2Mg + O2 → 2Mg O
Which is used as a catalyst during the process of hydrogenation of oils?
