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प्रश्न
Mention the various conditions required for a chemical reaction to occur.
उत्तर
The conditions required for a chemical reaction to take place:
- Physical contact
- Solution of reactants
- Electricity
- Heat
- Light
- Catalyst
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संबंधित प्रश्न
Changes in which new substances are formed are called ______ changes.
Complete and balance the following chemical equations
Na + H2 O →
Fill in the blank
A change in which the substance can be brought back to its original state is called a _______ change.
Give reason for the following:
Molybdenum is used in the manufacture of ammonia.
Write your observation and a balanced equation in the case of the following substances being heated.
Copper nitrate.
Write your observation and a balanced equation in the case of the following substances being heated.
Zinc carbonate.
Complete the table given below.
| Heat on Zinc nitrate | Colour of residue |
The chemical name of baking soda is sodium bicarbonate.
______ is the chemical name of rust.
______ is a chemical substance is used in whitewashing.
