Advertisements
Advertisements
प्रश्न
State four important characteristics of compounds
Advertisements
उत्तर
Four Important Characteristics of Compounds are as follows:
1. When the compound is formed energy like heat, light, or electricity is either needed or produced.
2. A compound has properties entirely different from the properties of its constituents.
3. Change in weight takes place.
4. It cannot be separated into its constituents by simple physical means.
APPEARS IN
संबंधित प्रश्न
Fill in the blank
In a _______ the substances are not combined chemically.
The methods of separating components of a given mixture are based on the
Name the elements which form water.
How will you justify that water is a compound?
What is the proportion of element present in the following compound?
H2O
What is the proportion of element present in the following compound?
CO2
What is the proportion of element present in the following compound?
NO2
State three differences between water and air.
Write the molecular formulae of compound lead sulphide.
Explain the term compounds.
Write the chemical formula and name the elements present in the following compounds.
- Sodium chloride
- Potassium hydroxide
- Carbon dioxide
- Calcium oxide
- Sulphur dioxide
What are compounds? Give two examples.
Explain the characteristics of compounds
Mention the uses of the following compounds.
- Baking soda
- Bleaching powder
- Quick lime
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.
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal which is known to form the largest number of compounds.
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.
Write any two properties of a compound.
Complete the table
| Compound | Constituent elements |
| Sodium carbonate | Sodium, Carbon. Oxygen |
| Water | |
| Calcium oxide | |
| Sugar | Carbon, Hydrogen, Oxygen |
Name the compounds used in fertilizers.
