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प्रश्न
What do you understand by 'chemical reaction'?
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उत्तर
A chemical reaction is the process of breaking the chemical bonds of the reacting substances (reactants) and making new bonds to form new substances (products).
A chemical change or chemical reaction occurs when particles collide. Collisions occur when reactants are in close contact or by supply of energy.
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संबंधित प्रश्न
Give one example that illustrates the following characteristics of a chemical reaction:
Change in state
Complete and balance the following chemical equations:
`"H"_2"S"` + `"CI"_2` `→`
TRUE \ FALSE
Evaporation of water is a physical change. True or false ?
Give an example of a reaction where the following are involved
Light
Complete and balance the following reaction:
Pb(NO3)2 + KI →
Write your observation and a balanced equation in the case of the following substances being heated.
Ammonium chloride
Give a balanced equation for the conversion of an ammonium salt to a basic gas.
Photosynthesis is a chemical reaction that takes place in the presence of ______.
A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.
What changes do you expect?
Write the effects of chemical reactions.
