In physical changes the solutes and solvents can easily be separated by
The process of breaking down of any substance into smaller substances by heating, is called
Dilute acids and alkalis react together to form
Irreversible changes include
Changes occur in matter at
Zinc salt reacts with dilute shulphuric acid to form zinc salt and
Natural gas is made up of compound
Power machines in factories and vehicles are examples of
Natural gas is more efficient and produces less
Fuel obtained from fossils is known as
The process in which reactants react together to form a product, is called
At room temperature iron and sulphur
If two or more substances are combined to form a new substance, the chemical reaction is termed as
When substance combines with oxygen while burning, the reaction is termed as
If both water and carbon dioxide is given to plant it will not be able to prepare its own food in absence of
Melting, freezing, boiling, evaporation and condensation are all
Chemical change involves the formation of
The change which is not accompanied by formation of new substance is called a
Chalk, limestone, marble, eggshells and seashells are made of
The conservation of mass is obtained when the total mass of reactants is equal to total mass of
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