What is fossil fuels ?
These were formed from the dead remains of living organisms (fossils). So, these are all known as fossil fuels.
What is an Exhaustible Natural Resources ?
Exhaustible Natural Resources: The amount of these resources in nature is limited. They can be exhausted by human activities. Examples of these resources are forests, wildlife, minerals, coal, petroleum, natural gas etc.
What is an Inexhaustible Natural Resources ?
Inexhaustible Natural Resources:These resources are present in unlimited quantity in nature and are not likely to be exhausted by human activities.Examples are: sunlight, air.
The uses of some non metals
The uses of some non metals. Here are some interesting ones. We are sure that you will guess them right:1) Non-metal is essential for our life which all living beings inhale during breathing,2) Non-metals used in fertilisers to enhance the growth of plants,3) Non-metal used in water purification process,4) Non-metal used in the purple coloured …
Displacement Reactions
when a more reactive element displaces, a less reactive element from a compound that contains the less reactive element.is called a displacement reaction. Copper Sulphate (CuSO4 ) + Zinc (Zn)→ Zinc Sulphate (ZnSO4) + Copper (Cu) ( Blue ) (Colourless) (Red)
Reaction of sodium with Water and oxygen.
Sodium metal is very reactive. It reacts vigorously with oxygen and water. A lot of heat is generated in the reaction. It is, therefore, stored in kerosene.
What happen when When sulphur dioxide is dissolved in water ?
When sulphur dioxide is dissolved in water sulphurous acid is formed. The reaction can be givenas follows:Sulphur dioxide (SO2 ) + Water (H2O) → Sulphurous acid (H2SO3 )
CORROSION IN COPPER
CORROSION IN COPPER :- When a copper vessel is exposed to moist air for long, it acquires a dull green coating. The green material is a mixture of copper hydroxide (Cu(OH)2) and copper carbonate (CuCO3 ). The following is the reaction 2Cu + H2O + CO2 + O2→Cu (OH)2 + CuCO3
REACTION OF METAL WITH OXYGEN
Iron (Fe) + Oxygen (O2 ) + Water (H2O) → ?Magnesium (Mg) + Oxygen (O2 ) → ? Iron (Fe) + Oxygen (O2 ) + Water (H2O) → Fe2O3. xH2O( Rust)Magnesium (Mg) + Oxygen (O2 ) →Magnesium oxide ( MgO) + Hydrogen gas (H2)
What is liquid metal at room temperature ?
Mercury (Hg ) is the only metal which is found in liquid state at room temperature.