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प्रश्न
Define the following terms
Chemical bond
उत्तर
A chemical bond is the force which holds the atoms of a molecule together as in a compound.
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संबंधित प्रश्न
Define the following terms:
Effervescence
Complete the following statement.
A catalyst either ______ or _____________ the rate of a chemical change but itself remains ______________ at the end of the reaction.
Name a nitrate which produces brown gas on heating.
What do you observe? When
Silver chloride is exposed to sunlight.
What do you observe? When Hydrogen peroxide is exposed to sunlight.
What do you observe? When H2S gas is passed through copper sulphate solution.
Give an example of a reaction where the following is involved .
Evolution of heat
Give an example of a reaction where the following is involved .
Absorption of heat
Give an example of a reaction where the following is involved .
High pressure is required
Give one reason why magnetizing a piece of steel is a physical change.
