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प्रश्न
________ is a chemical substance which alters the speed of a chemical reaction.
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उत्तर
Catalyst is a chemical substance which alters the speed of a chemical reaction.
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संबंधित प्रश्न
How is precipitate formation in a chemical reaction indicated?
Fill in the blank
A new substance is always formed in a _______ change.
Give an example of a reaction where the following are involved
Heat
Give an example of a reaction where the following are involved:
Close contact
Give an example of a reaction where the following are involved
Pressure
Give an example of the following chemical change.
Two gases combine to form white solid
State the main characteristics of chemical reactions. Give at least one example in each case.
Give an example of a photochemical reaction.
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 |
Complete the table given below.
| Flame test for calcium chloride | Acid used for flame test |
