Advertisements
Advertisements
प्रश्न
Giving examples, state the difference between balanced and unbalanced chemical equations.
उत्तर
| Balanced Chemical Equation | Unbalanced Chemical Equation |
| A balanced chemical equation has an equal numbers of atoms of different elements in the side of reactants and products. | An unbalanced chemical equation has an unequal number of atoms of one or more elements in the reaction. |
| In a balanced chemical equation the sum of masses of the reactants is equal to the sum of the masses of the products. | In an unbalanced chemical equation the sum of masses of the reactants is not equal to the sum of the masses of the products. |
| It obeys the law of conservation of mass | It does not obey the law of conservation of mass |
| Example: Zn (s) + H2SO4 (aq) → ZnSO4(aq) + H2 (g) Here, number of Zn, H, S and O are same in both reactants' and products' side. |
Example: H2 + O2 → H2O Here, one oxygen atom is more in reactant's side than in product's side; it means one atom of oxygen is being destroyed, which is a violation of law of conservation of mass |
APPEARS IN
संबंधित प्रश्न
Translate the following statement into chemical equation and then balance it.
Hydrogen sulphide gas burns in the air to give water and sulphur dioxide.
Potassium chlorate (KClO3) on heating forms potassium chloride and oxygen. Write a balanced equation for this reaction and indicate the evolution of gas.
With the help of an appropriate example, justify that some of the chemical reactions are determined by Change in colour
Give chemical equation for the reaction involved in the above case.
State one characteristic of the chemical reaction which takes place when wax is burned in the form of a candle?
Name the type of chemical reaction shown by the following equation:
2Mg+ O2 → 2MgO
Write the balanced chemical equation of the following reaction.
sulphur + nitric acid→ sulphuric acid + nitrogen dioxide + water.
Representation of the results of a chemical change – is a chemical equation.
For the equation: FeCl3 + 3NH4OH 3NH4Cl + Fe(OH)3 ↓
Answer the following:
Write the word equation for the above molecular equation.
CaCO3 + 2HCl[dil.] → CaCl2 + H2O + CO2 [g]
State the information provided by the above chemical equation.
Write a balanced equation for the following word equation:
Nitrogen dioxide + Water + Oxygen → Nitric acid
To balance the following chemical equation the value of x and y should respectively be:
\[\ce{2NaOH + xAl_2O_3->yNaAlO_2 + H_2O}\]
