What is the chemical reaction in which a substance break up on heating to form two or more simpler substances, which can be either elements or compounds?
Combination reaction
Displacement reaction
Double decomposition
Decomposition reaction
The new substance which obtained by any chemical reaction is known as
Reactant
Catalyst
Product
Pure substance
In a chemical equation, the number of the atoms of the reactants equal to the number of the atoms of the
Matter
Energy
The reaction between hydrogen and chlorine to form
Hydrogen peroxide
Water
Hydrogen chloride
Ammonia
Burning of candle is a change of
Colour
Physical level
Chemical level
Melting of wax is a
Chemical change
Physical change
Colour change
Energy change
The product obtained when the water is treated with carbon dioxide is
Carbon monoxide
Carbonic acid (hydrogen carbonate)
Acetic acid
Lactic acid
A temporary change in which no new substance is formed is called
Chemical reaction
Permanent change
Which is the chemical reaction in which a more reactive element displaces a less reactive element from its compound?
Double decomposition reaction
