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प्रश्न
Give an example of a chemical reaction for the following situation:
A change in colour is observed
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उत्तर
Reaction between copper sulphate and iron metal – blue solution of copper sulphate changes to the green solution of ferrous sulphate.
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संबंधित प्रश्न
Fill in the blank.
The formation of gas bubbles in a liquid during a reaction is called ......................
What are the characteristics of a chemical reaction ? A chemical reaction is characterised by an irreversible change in which a new substance is formed.
Fill in the blank
A change in which the substance can be brought back to its original state is called a _______ change.
Complete and balance the following reaction:
\[\ce{CuCO3 ->[\Delta]}\]
Distinguish by heating the following in dry test tubs.
Copper Sulphate and copper carbonate
Distinguish by heating the following in dry test tubs.
Ammonium Chloride and iodine.
Complete the table given below.
| Addition of dil. H2SO4 to FeS | Odour of gas evolved |
Explain with the help of balanced equations, how precipitation reactions are used for identifying the positive radicals in three different salts, each having a different cation [positive ion].
Photosynthesis is a chemical reaction that takes place in the presence of ______.
Which of the following statement is incorrect for a chemical reaction?
