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प्रश्न
Explain the characteristics of compounds
Write any five characteristics of compounds.
थोडक्यात उत्तर
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उत्तर
- A compound is formed only when the constituent elements combine in a fixed proportion.
- The properties of a compound are different from those of its constituent elements
- A compound cannot be broken down by physical methods.
- This is because a compound is made up of different elements that are chemically combined. Sodium chloride cannot be separated by physical methods such as filtration.
- A compound can be separated into its constituent elements by chemical methods only.
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संबंधित प्रश्न
Fill in the blank
In a _______ the substances are not combined chemically.
Select the correct alternative from the choices given for the following statement:
A set of mixture is
What is the difference between a pure substance and a mixture ?
What is the molecular formula of the following compound?
Hydrochloric acid
Match the following.
| Iron | For making wires |
| Copper | Sewing needle |
| Tungsten | As a fuel for ignition in rocket |
| Boron | Making the filament of a bulb |
State whether true or false. If false, correct the statement.
Aspirin is composed of 60% Carbon, 4.5% Hydrogen and 35.5% Oxygen by mass. Aspirin is a mixture.
Which of the following are not compounds?
- Chlorine gas
- Potassium chloride
- Iron
- Iron sulphide
- Aluminium
- Iodine
- Carbon
- Carbon monoxide
- Sulphur powder
Classify the following as element and compound,
- Silver
- Ammonia
- Water
- Mercury.
Complete the table
| Compound | Constituent elements |
| Sodium carbonate | Sodium, Carbon. Oxygen |
| Water | |
| Calcium oxide | |
| Sugar | Carbon, Hydrogen, Oxygen |
A compound has a fixed ______.
