Advertisements
Advertisements
प्रश्न
Decomposition reactions can occur by heat.
Give two balanced reactions for each.
Advertisements
उत्तर
Heat:
In these types of reactions, a single reactant breaks down to give simpler products.
For example, when ferrous sulfate crystals are heated, they lose water and the colour of the crystals changes. This is because ferrous sulfate decomposes to ferric oxide, sulfur dioxide and sulfur trioxide.
\[\ce{\underset{\text{(Ferrous sulphate)}}{2FeSO4(s)} ->[\Delta] \underset{\text{Ferric oxide}}{Fe2O3(s)} + SO2(g) + SO3(g)}\]
Thermal decomposition of calcium carbonate to produce calcium oxide and Carbon dioxide is very important in many industries. The product calcium oxide, which is also called lime or quicklime, is used to manufacture cement.
\[\ce{\underset{\text{(Lime stone)}}{CaCO3(s))} ->[\Delta] \underset{\text{(Quick lime)}}{CaO(s)} + CO2(g)}\]
APPEARS IN
संबंधित प्रश्न
State the type of reactions for the following represent and balance the ones that are not balanced.
AgNO3 + NaCl → AgCl + NaNO3
What is a double displacement reaction?
Define the following type of chemical change or reaction with a suitable example.
Decomposition reaction
Give a balanced equation for a direct combination reaction involving:
Two elements – one of which is a neutral gas and the other a monovalent metal
Give a balanced equation for the following reaction of synthesis involving the formation of:
An acid – from sulphur dioxide gas
Convert hydrogen to hydrogen chloride by a direct combination reaction.
Give a balanced equation for thermal decomposition of mercury [II] oxide
State the double decomposition – neutralization reaction with a suitable representation.
Complete the statement by filling in the blank with the correct word:
The neutral gas evolved when lead nitrate undergoes thermal decomposition is _________.
Chemical reaction in which reactants react to form products and the products formed react with each other directly to form the original reactants back is known as ______ reaction.
