Advertisements
Advertisements
प्रश्न
State whether the following statement is true or false:
A chemical equation can be balanced easily by altering the formula of a reactant or product.
Advertisements
उत्तर
This statement is false.
Explanation:
In a chemical equation, the numbers preceding the compounds are called stoichiometric coefficients. The coefficients must be altered to achieve a balanced chemical equation. A chemical reaction is balanced by altering the stoichiometric coefficients rather than modifying the formulas of the reactants or products.
\[\ce{CH4 + 4Cl2 ->CCl4 + 4HCl}\]
APPEARS IN
संबंधित प्रश्न
Correct and balance the following equation:
Ca + H2O 
CaOH + H
Balance the given equation:
BaCI2 + H2SO4 
BaSO4 + HCI
Aluminium hydroxide reacts with sulphuric acid to form aluminium sulphate and water. Write a balanced equation for this reaction.
Write the balanced equation for the following reaction, and add the state symbols:
Sodium hydroxide reacts with sulphuric acid to produce sodium sulphate and water.
State one characteristic of the chemical reaction which takes place when dilute hydrochloric acid is added to sodium carbonate.
Give one example of an endothermic reaction.
Write word equation for the following skeletal equation:
\[\ce{FeCl2 + Cl2 -> FeCl3}\]
Write symbolic representation for the following word equation and balance them :
Calcium carbonate → Calcium oxide + Carbon dioxide.
Write your observation and name the product when ron nails are added to an aqueous solution of copper sulphate.
Balance the following equation:
Fe + H2O → Fe3O4 + H2
Balance the following equation:
Pb3O4 + HCl → PbCl2 + H2O + Cl2
What is the valency of :
carbon in CH4
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate moles of chlorine gas formed.
Representation of the results of a chemical change – is a chemical equation.
For the equation: FeCl3 + 3NH4OH 3NH4Cl + Fe(OH)3 ↓
Answer the following:
Name the reactants and the products in the above equation.
Balance the following simple equation:
Zn + HCl → ZnCl2 + H2
Balance the following simple equation:
Mg + CO2 → MgO + C
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
Na2SO3 + HCl → 2NaCl + H2O + SO2
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
PbO2 +4HCl → PbCl2 + H2O + Cl2
The following reaction is an example of a `4"NH"_3("g") + "SO"_2 -> 4"NO"("g") + 6"H"_2"O"("g")`
- displacement reaction
- combination reaction
- redox reaction
- neutralisation reaction
Why should a magnesium ribbon be cleaned before burning in air?
