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प्रश्न
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?
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उत्तर
Yes, rusting is a chemical change since a new substance is formed.
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संबंधित प्रश्न
Balance the following equation :
Fe + H2O → Fe3O4 + H2
Give reason for the following:
Blue solution of copper sulphate changes to green when a piece of iron is added to this solution.
State the type of reactions for the following represent and balance the ones that are not balanced.
Cl2 + 2KBr → 2KCl + Br2
Multiple choice:
Which of the following is not a characteristic of a chemical change?
Give a chemical test to distinguish between the following gases.
HCl and Cl2
Give balanced equation for the following conversion affected by heat alone on the substance:
Copper carbonate to copper oxide
Explain the term chemical reaction with special reference to reactants and products.
Assertion: The formation of iron oxide from iron is a chemical change.
Reason: For the rust to form from iron, it must be exposed to air and water.
Burning of paper is the best example of ______ change.
Give an example of a chemical reaction for the following situation:
A change in colour is observed
