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Question
What will you take into account while identifying the following?
A chemical change in a substance.
Solution
Chemical changes are changes that involve the reaction of substances with one another. Such reactions result in alterations in the chemical compositions of the substances involved. These changes lead to the formation of new substances.
Characteristics:
- One or more new substances are formed during a chemical change.
- Most chemical changes cannot be reversed easily.
- The chemical composition of a substance undergoing chemical change does not remain the same.
- A chemical change is always accompanied by a change in energy.
RELATED QUESTIONS
Classify the following as chemical or physical change:
Passing of electric current through water, and water breaking down into hydrogen and oxygen gases.
Classify the following as chemical or physical change:
Burning of paper and wood
Melting of solid (wax) is a physical change.
State whether the following is physical or chemical changes.
glowing of a bulb -
Tick the most appropriate answer.
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Which of the following are physical changes and which are chemical changes ?
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Classify the following as a physical or a chemical change.
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State whether the following statement is true or false. If false write the correct statement.
Melting of ice is an exothermic, irreversible chemical change.
Filling up a balloon with hot air is a _______ change.
______ is the Universal Solvent.
