Advertisements
Advertisements
प्रश्न
State two characteristics of water which prove that it is a – compound.
Advertisements
उत्तर
Characteristics of compounds
- Elements in a compound are present in a definite proportion. Example 2 atoms of hydrogen combine with 1 atom of oxygen to give 1 molecule of water (compound) H2 + O = H2O (water)
- Compounds have a definite set of properties
Example: The properties of the compound water are different from the properties of the elements of hydrogen and oxygen in the water.
संबंधित प्रश्न
Select the correct alternative from the choices given for the following statement:
A set of mixture is
Define Compounds
Name the elements which form water.
How will you justify that water is a compound?
Write the molecular formulae of compound calcium oxide.
Write the molecular formulae of compound carbon monoxide
Tabulate a comparative chart – to differentiate between elements, compounds, and mixtures. Differentiate them with reference to Separation of compound
What is the molecular formula of the following compound?
Sulphuric acid
What is the molecular formula of the following compound?
Sodium chloride
State true of false. If false, give the correct statement.
Compounds and elements are pure substances.
Write the chemical formula and name the elements present in the following compounds.
- Sodium chloride
- Potassium hydroxide
- Carbon dioxide
- Calcium oxide
- Sulphur dioxide
Explain the characteristics of compounds
Assertion: Oxygen is a compound.
Reason: Oxygen cannot be broken down into anything simpler.
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 |
Sodium chloride is used as table salt and for flavoring and preserving food.
Which of the following are not compounds?
- Chlorine gas
- Potassium chloride
- Iron
- Iron sulphide
- Aluminium
- Iodine
- Carbon
- Carbon monoxide
- Sulphur powder
Higher-Order Thinking questions:
Why is water considered a compound?
A compound has a definite ______.
