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प्रश्न
Fill in the blank.
The reaction in which energy is evolved is called
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उत्तर
The reaction in which energy is evolved is called exothermic reaction.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Passing of electric current through water, and water breaking down into hydrogen and oxygen gases.
Write true or false for the statement.
Burning of paper and formation of curd are reversible changes
State one instance where water undergoes a physical change and one in which it undergoes a chemical change.
Given reason:
Freezing of water to ice and evaporation of water are physical changes.
State what is meant by the term – interconversion of matter. Is interconversion of matter a physical change or a chemical change.
Give a reason why
Change of seasons is a periodic change while the change of weather is a non-periodic change.
In a solution of salt in water, water is the solute
Higher order Thinking question
Boiling of water is a physical change; but boiling of egg is a chemical change. Why?
Ice, water and water vapour look different and display different ______ properties but they are ______ the same.
Which of the following is a physical change?
