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प्रश्न
Define a photochemical reaction.
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उत्तर
A chemical reaction that occurs in the presence of light is called a photochemical reaction.
संबंधित प्रश्न
How is precipitate formation in a chemical reaction indicated?
Fill in the blank
A new substance is formed in a _______ change.
Fill in the blank:
In some chemical reactions an insoluble ________ is formed when two solutions are mixed.
Write true or false :
When iron and sulphur are heated together a grey mass is formed which is attracted by a magnet .
Write the chemical reaction where the following changes are observed.
Precipitate is formed
What do you understand by precipitation reaction? Explain with examples.
Complete and balance the following reaction:
\[\ce{Pb(NO3)2 ->[\Delta]}\]
Complete the following table and write your observations.
|
Hydrogen sulphide |
Ammonia |
Sulphur dioxide |
Hydrogen chloride |
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Shake the gas with red litmus solution |
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Shake the gas with blue litmus solution |
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Apply a burning splint to a gas |
Select the correct answer from the options given below:
State the gaseous product formed, when
An ammonium salt reacts with an alkali.
______ is the chemical name of limestone.
