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प्रश्न
Write the chemical reaction where the following changes are observed.
Colour change is noticed
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उत्तर
\[\ce{Fe + \underset{\text{Blue solution}}{CuSO4_(_a_q_)} ->\underset{\text{Green solution}}{FeSO4 + Cu}}\]
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संबंधित प्रश्न
Complete the statement by filling the gap using an appropriate term from the terms given in the bracket.
(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)
An ______ is drawn in between the reactants and products while writing the equation for a chemical reaction.
Define the following term:
Precipitate
Give one example electrochemical reaction.
What do you observe when Cl2 is passed through potassium iodide (KI) solution.
Select the correct answer for the following options:
The gas obtained when potassium chlorate is heated in the presence of a catalyst.
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- Colour change
- Effervescence or gas evolved
- Evolution or absorption of heat
- Formation of a precipitate.
With reference to each of the above indications, state the external indication seen during – Addition of water to quicklime.
______ gas causes tears in our eyes while cutting onions.
The percentage composition of Nitrogen in Ureas is ______.
______ are substances that speed up the process of a chemical change and it will not undergo any change during the course of the reaction.
Write five changes in the characteristics of a substance that can take place during a chemical change.
