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प्रश्न
State two characteristics of water which prove that it is a – compound.
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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
Define Compounds
Name the elements present in Ammonia
Name the elements present in Marble
What is the proportion of element present in the following compound?
CO2
What is the proportion of element present in the following compound?
NO2
Name two compounds which dissolve in water.
Write the molecular formulae of compound calcium oxide.
Write the molecular formulae of compound lead sulphide.
Give the example of a compound containing nitrogen and oxygen.
What is the molecular formula of the following compound?
Hydrochloric acid
What is the molecular formula of the following compound?
Methane
State true of false. If false, give the correct statement.
Compounds and elements are pure substances.
Assertion: Oxygen is a compound.
Reason: Oxygen cannot be broken down into anything simpler.
What is meant by compound?
Which of the following are not compounds?
- Chlorine gas
- Potassium chloride
- Iron
- Iron sulphide
- Aluminium
- Iodine
- Carbon
- Carbon monoxide
- Sulphur powder
Reason out
Sand is also known as silica.
A compound has a definite ______.
Name the compounds used in fertilizers.
