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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
When a candle burns, both physical and chemical changes take place. Identify these changes. Give another example of a familiar process in which both the chemical and physical changes take place.
Fill in the blank.
A new substance is formed in a ............... change.
State the differences between a physical change and a chemical change.
What role does energy play in initiating a chemical change ?
What are reversible and irreversible changes ? Give one example for each.
State whether the following is physical or chemical changes.
glowing of a bulb -
Tick (√) the correct alternative from the choice given for the following statement
Which one of the following is volatile in nature ?
Fill in the blank
Heat is ________ by a gas during the process of condensation.
What is a physical change ? Give two examples of physical changes.
A change in which matter undergoes a change but the total mass of the substance is unaltered is a ______ change.
